The answer is always "a lot more than you could ever imagine".Your tenants look like they have way too many red flags. 

Some high-end STR's (like in Joshua Tree) do use professional models, but for your market and property type, I’d suggest removing personal photos and focusing on the space itself, so guests can imagine themselves there, which is really what you want.You also have 81 photos, that’s too many.

The increased risk is generated by the fact that the owners are relying on the validity of the tenancy in common Agreement for their usage rights, and it is possible to imagine legal circumstances under which this validity might be undermined.- If the subdivider or someone with relationship to subdivider sells, a public report must be done.

Can you imagine actually communicating with your borrower?

I imagine his partner Amy will blame him when the SEC comes knocking.

Own every nice toy, item, apparel, everything imaginable.

As for by-the-room rentals, many lenders won't allow that and if they do, they qualify you off of the long term market rents (which, as I'm sure you can imagine, would be considerably lower than the actual per-room rents).

I imagine I can get his wages garnished or maybe collect from his tax return.  

I agree with Collin.The Smokies do have a lot of competition, so you need to have a view, decent location, good to great amenities etc to stand out.We have a 6-bedroom cabin there, but I imagine a 3 to 4 bedroom would be in the sweet spot of not too big or not too small.

While you might not want to lose the tenant, it'll likely wake her up and rethink things