Gotta say, most of the dozens of tire blow-outs, both on FGRV's and mini motorhomes that I am familiar with occurred with over age tires
. Yes, a few have happened with newer tires, some that had prior road damage but, after you remove the number of blowouts from those causes, the number of blowouts on RV's is very small and, IMHO, not sufficient enough to warrant making a selection based on the fear of that happening.
BUT... in one FGRV I saw several years back, the owner had squeezed metal trailer fenders into the existing wheel wells as armor to protect against blow-out damage.
Bottom line: Take care of your tires, do not leave them exposed to sun during storage, monitor tire pressure, inspect for damage often and toss them on their 5th birthday. And, BTW, don't buy cheap tires.....
I have seen it mentioned in earlier posts that the Lil Snoozy frames are built by a boat trailer builder, which might better explain the wider stance.