If you are facing similar challenges, I am considering developing a more general solution and will be happy to share it here soon

It would be best to perform the renovation of the unit and have a long term solution in place. 

Owners/Operators have to identify new and innovative ways to offset these expenses just to survive.One of the most common solutions I keep hearing is bringing property management in-house (aka vertical integration).

Did you find a solution?

Also you need to figure out how you intend to cover inevitable property damage done by guests but there are plenty of solutions for that in the marketplace where guests pay a flat fee per reservation in lieu of a deposit and you get covered for an assortment of potential issues (bad checks, credit card chargebacks, fraud, personal property damage, etc.)  

Hey Daniel, let's chat I have a good solution for you.  

Rather than perform tests to make life more expensive these simple steps will cure most issues.Yeah, Killz can be a great solution for covering stains, especially smoke related.

Hi Fellow STR Investors,I'm reaching out to see if anyone has found effective solutions for durable curtain installations.

Hi Duane, we actually have a solution for that.

If your CPA doesn't have viable solutions for you, then make sure you exhaust your idea with more professionals as you may outgrow your CPA's "traditional" knowledge.