trailer tire advice

Hello all. New here. I want to caveat this with I'm not a professional. I will be hauling my own vehicles. I'm hauling with a Freightliner FL70 and a Kaufman mini 5. The mini 5 needs all new tires. it currently has 215/75r17.5. Kaufman states it came with 235/75r17.5. I'm trying to figure out the best set of tires to get without completely breaking the bank. I will be taking about 5 trips from VA to CO loaded and empty back. So need something that is safe and will last at least 20k miles. Prices seem to be all over the place from $100 -$500/tire. If I move to 235 from 215 I will need 8 tires (6 runners and 2 spares), so trying not to spend half the cost of the trailer just on tires but want tires that will last. There are a bunch of places selling tires but the below sight had a good selection of the gamut of tires out there. https://www.tires-easy-truck.com/ti...sition,categoryPath,Commercial+Truck--Trailer

Anyone have some recommendations?

Truck

 

Assume you are saying to contact them for a recommendation and qoute?

 

Clearance isn't a problem. there is 3in above current tires to the fender and 2in in the front and back of tires to the fenders.

 

Yes, the difference between 4600 and 6000 lbs. Another reason I thought going back to recommended 235s would be good.