Tankme you should really think about one of these truck trailer combos. You can get truck and trailer for under $80 with free shipping. Prices really vary so you should shop around, but here's one example. You have to click on the center thumbnail photo to get the price of the truck/trailer, but is $78.92
https://www.aliexpress.us/item/32568...yAdapt=glo2usa
The cab swap is easy and cheap. I mean, it's almost like they knew the M5 was coming out when they built this and made it a perfect fit.
I guess WPL also calls this the B36-3. Good truck, drives real well and you can raise and lower the ramps from the TX. I still haven't gotten brave enough to try actually driving the M5 up on the trailer, but I'll get there eventually.