I have the same problem.
I remove the 31" tires and install 8" utility rims and 4.80x8 tires. They are even highway legal.
They have like 1" of back space and cost $30 ?? each.
I'm also spring over so switching to spring under gains another 5".
My hitch, normally 18" off the ground is now 8" so I slammed the trailer 10". I could pull the tires and roll on steel for another 4".
I should be looking for a slammed Nissan hardbody to tow it.
No matter what I'd find wheels that work, maybe even rims without tires...
4 jacks will be more expensive and less stable than 2 cheap rims which will roll over the transition.
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