Geez, just reading some of the threads on here would have given you a heads up on how difficult (not impossible) it is to get pet odors out.

I am not saying it is impossible, I am just saying that waiting may not work in your favor. 

Just a whitewash because it is impossible to mop plywood like I do cement slabs.

I'd be surprised if it truly proved impossible to locate the out of state heirs - there are may tools available to locate folks (though, I don't claim to be an expert) - just depends on how much it is worth to you.What did the probate court decide/approve?  

Being in a wheelchair working as an agent for a company that doesn’t specialize in wheelchair accessible housing would be nearly impossible, I assume.

(That is not an answer to your question though, just the opinion of one inspector from WA state regarding a different home.)This would limit the target market and the potential for remodeling in a home, and therefore obviously market value as well, although it's impossible to hazard a guess as to how much without knowing the price range of the home and specifics about how costly or involved the fix is.Just be aware (as you may already know) that while the contractors who deal with this kind of thing may (or may not) have decent training, some remediation companies make a killing sending out lackeys to do the actual work - those people are sometimes poorly trained and may need supervision to do any job.Bummer about the Zonolite, never ran into it that I know of for nearly 20 years in RE except for recently, but apparently there's still a lot of it out there.

Most of the time it is typical ground earth settlement at some point over the past 200 years that is not hazardous and impossible to reverse. 

Then you should get some equity back and can put it toward your next one.the first one is FHA he has to live in it for a year and since it passed FHA inspection it most likely has little to no value add potential. this is mission impossible without going the friends and family route..  

I’m sure this would be difficult and maybe impossible since it would be my first flip as well.

Impossible to say without knowing what those inspection items are.