Assuming it is a bad kind of mold, get the seller to put the amount required to have it professionally re-mediated into an account held in trust until the work is done and inspected. 

@Ken Luttrell, Any type of real estate held for productive investment use can be exchanged for any other type. 

The property is in an LLC will get on the phones early tomorrow to see if I can get a HELOCYou’re going to have a very difficult time finding a lender who will do a HELOC on an investment property that’s held in a LLC.

It should be held by the title company.

@Alan HowardHeavily depends on the facts, circumstances, and goals of the members.Too broad to answer as a general question.Generally rental real estate shouldn't be held inside of a corporate tax entity. 

Unless the surface is a factory finish or a baked on metal type finish.

Owner held the note.

I work as a welder metal fabricator 9-5 and my wife is a sales associate.

Despite all these negatives, they held on and made some really good money and are now selling them for nice profits. 

@Kenneth GarrettI always wondered how rents held up during the last crash.