Jimny farm runabout, dont want to make wheel ruts.

I'm looking into using a Jimny as a farm runabout as an alternative to a "side by side" UTV like the Kawasaki Mule, Polaris Ranger & John Deere Gator.
Really I'm looking for advice & opinions on what mods I should be thinking about, here's list of things points I've thought about:

Off-road capability that you as users may be looking for wont be needed as the going will be fairly tame copared to what many of you tackle, but it will be asked to travel some fairly soft going, the same route every day for months on end while making as little mess as practical.

Wider wheels are likely, but how wide? Is it better to go as wide as possible in an effort to stay on top or a bit more moderate with a really aggessive tread to prevent the wheels spinning? Wheels that stick out a lot will be harder on kingpins & wheel bearings etc, what problems are folk seeing?

I'd rather not have to lift the body if possible, anything that makes it harder to get in & out of or to load & unload is not a good thing.
Major arch mods are not a problem, welding, fabrication & bodywork I'm happy to tackle & cosmetics are not a big issue!

The UTVs weigh between 650-800kg, a Jimny is around 1100kg? so it going to need a little more tyre to avoid sinking into the mud. It'll be asked to carry mabye 400kg & tow 600kg at times.

Top speed of 35-40mph would be enough, any more a luxury. I'm thinking anything that lowers the gearing would be good, but just standard would probably be fine at least until we know if it's going to be a useful vehicle. (I'm really thinking tall tyres good as they may be would cause a problem here)

Road use will be minimal, mabye 1-2 miles a day & around 6 miles a day in total including running about fields, taxed as an agricultural vehicle or on a limited use permit.

If it proves useful then I'll fit a 1.7 Isuzu diesel that I have kicking about, which as luck would have it seems to be a popular choice for those looking to run on the oily stuff.

Nothing is too much a of a problem to do if it's a worthwhile mod, my ability in the workshop is decent enough & I've got a fair amount of kit to play with, mabye less time than I'd like!
Budget is not unlimited, the UTVs would do the job well, but the cost is the reason I'm looking at this (and any excuse to get into the workshop is not to be missed!).

Thanks for any input.

If 4x4 is critical which it sounds like it is then fit some manual hubs. The vacuum pipes will rot away soon enough

that's a big ask !
i regularly offroad with gators and quads and know their abilities . i personally don;t think you can achieve what you need .to modify a jimny to the degree you need will cost thousands.
you need to check out a few well modified jimnys near you before you decide whether you can do what you want with one.
a good used honda quad would probably fit the bill better. if it wasnt for the fact i need mine as a daily driver i'd be on a quad myself.
good luck and please look into this carefully before shelling out.

i'll qualify my comments above. the only time i have ever been stuck in my jimny ( unable to proceed , not stranded ) was when following a gator and a quad through some forestry. everywhere they went i went, no problem. we exited the forestry onto a field growing for silage. the first 100 yards or so were no problem then it got real boggy due to the rain. the quad and gator glided over this section of the field without leaving a trace. even in low box i had all wheels spinning and leaving deep ruts. after about 30 yards of progress i had to turn round and go back the way i came. i would have got through but at the expense of really damaging the ground .

The front hubs I'll have a look at then, 4x4s in general I'm fairly familiar with* but Jimnys are new to me.
I should make something clear which mabye I have not, there will be no need to match the awesome off-road ability of the the quads, just to travel around the farm without making deep ruts. I'm an agric engineer & work with quad & UTVs everyday, I have a decent enough idea of what they'll do & we wont be going anywhere near that level. This is going out with a few bags of feed & sometimes a small trailer going from one field to another & along a couple of tracks which many of you would find most boring!
There is a quad doing the work already & it will be staying for the times its speed, agility & extra off road ability is needed. The Jimny is looking to provide more comfort, extra carrying capacity, the ability to carry a passenger & if I put the diesel motor in running on red diesel which are areas where the quad is lacking.
The UTVs which will do the job start at £12k new, £7k for something second hand ready to go, projects needing work less but there are little aftermarket parts available for them & I see the upkeep they need, plus there's not a massive lot of them out there to choose from. The ones cheap needing a fettle up are hard worked abused things & will not last like the Jimny should.

*nothing about actual off-roading, modding them etc but lots of MOT & servicing & general repair work.

i get what you're saying now. i was making the point though that to get tyres that will be as friendly as utv tyres you would have to go bigger to go wider. the standard jimny will accommodate 215 muds. driven carefully it will be fine on tracks and being narrow you can avoid most of the ruts preventing them from worsening. lowering tyre pressures will also reduce the impact.
the loads you mentioned may well tax the jimny heavily though.
i regularly use mine on estates and farms but there are areas i have to be careful with that the atv's dont need to be worried about.
where are you located ? if near enough you are welcome to come and have a look at mine and try it on the type of ground you will use yours on.