Let me put some truth to 2nd hand tyres.
Provided they are well kept, no punctures etc they are fine.
More so, most real farmers will keep a set of tyres in the shed for many years, let the rubber harden and never have a problem with punctures again.
They also never put great big fat tyres on with super aggressive tread patterns.
Take a good look what is on farm utes and the like of people who live in the area we sometimes venture.
Steel rimmed wheels shod with skinny tyres.
Some of my mates are deer hunters some retired and all put skinnies on their trucks.
Big wheels and tyres are for posers and most of us know that, there is the odd use for them but in general they are just for feeding our ego and sense of bigger is better.
Michelin XPC are wicked tyres, not perfect but what is.
I did have a set of Geolanders and also had good wear but terrible in any sort of mud.
This is a hard question as everyone has their own opinion and much is personnal preference.
Good luck and work out how much is for road use and be realistic.
It seldom exceeds 5-10%.

