You should find voting reqs in the CC&Rs and you may also potentially find language supporting your position that the HOA can't ban rentals in the permit / subdivision report.

@Ryan Mayes you can take cash, but it may be a portion of the $144k depending on your policy language. 

But, the GC says that he will provide the lien waiver from his company including the language that all sub contractors are paid without mentioning the name of the sub contractors.                           

Then I have a separate Addendum to the lease that lists in plain language the "rules." 

Would you recommend I write language into the land deal that allows me to terminate if I find a deed restriction/ HOA covenant that messes with future development? 

If you choose to go that route, then ideally, you'll want a consultant to come in and test (to prove that the problem is/isn't isolated to the area with the obvious mold), and you may even want them to write a "scope of work" to complete the remediation (mold tear out language).  

You could argue their language isn't the greatest (e.g.

My lease has language disallows fish tanks over a certain size.

Building is a hassle when you speak the language fluently and have a phone book. 

I'm fully aware that the language will be different depending on the state I live, and would need to review/written by an experienced attorney.