We purchased an RV last year under our personal names that is primarily used for business travel.

Personally, I just rip it down.

On the advice of the fireplace guy who did our last cleaning/inspection, we sanded down the brick inside and painted it with the high heat black paint, and it states in the lease that they may use a fireplace-style candelabra if they'd like, but any other use will trigger all the rules in the Fireplace Addendum.   

Perhaps there is a relevant book or podcast that you could suggest to expand my knowledge in this area.Considering you're experience with creative finance deals, which you mentioned previously, I am keen to hear about your personal insights and experiences.

The GC is a business person who doesn't care about your ARV, LTV, or your budget.

If the IRS has a Form 1098, they assume that the person listed on the form made the payments, and they move on. 

Others may have personal experience to share.

I find it's very personal, and dependent a lot on your goals, resources, risk tolerance, location, experience, etc.

I found an auction person, and I see listings online.

Other CPAs and firms have quoted me 5k-10k+ but are no where near as responsive and personable as my current CPA and accountant.