Certainly an OTR tractor will tow this weight easily--kind of wish you'd mentioned that in your original post where you say:
"I have zero experience with RV'ing."
As regards your project, currently you seem to be under-speccing your appliances and electrical sys, even by RVing standards. Generally speaking, RVs are moving towards residential appliances and residential-sized circuitry. Gas appliances and/or RV-specific appliances will both limit your capabilities and drag down the resale value you say you don't care about but mention in every reply.
If you want to see where high-end RVs are heading, browse high-end yatching sites. There you will find commercial-grade appliances whose physical size has been reduced way down while retaining high-end functionality--after all you keep saying "tiny".
Good luck and post pics!