Thinking of a 53' semi-Fifth wheel by Spacecraft

Yep, a KOA or most any private CG will find a space to cram something that sized into but that is about the same thing as eating at Dennys for every single meal.

If that is what floats your boat, fine, but it sure is restrictive on where it can go.

Something else to think about is when the day comes to sell it. That day WILL come. Maybe sooner than the OP thinks. Who is going to want something that size? A very small potential buyer pool.