HOA board members are generally unable to separate the "insult" of having to carry their neighbor financially from pure business decisions.I think your best bet is to work your deal so that the HOA is paid off in full. 

She is unable to maintain it.

I hate to rent once we get married (Currently live at home), but am unable to qualify for a mortgage.

If housing is unable to do anything, hire an attorney and get them out as soon as possible, period.As @Thomas S. pointed out, you should consider selling this home or giving it to a professional property manager that can get things back on track and put money in your pocket.

This property is encumbered with a loan the seller is (apparently) unable to pay off, despite collecting your payments. 

I am worried if I am unable to refinance do I lose properties? 

I really do not want to sell these properties but I will if I am unable to obtain a conventional loan with them in my portfolio.Thanks so much in advance.David

In your case, you should be able to because I am sure you dont have a separate bill under a partnership name or partnership is not earning interest in its own bank account and so forth.But your argument loses some strength where it is clear that the investors have jointly negotiated the terms of the transactions and would be unable to separately use their interests in the property without significant cooperation and joint efforts among the co-owners.

However, I am unable to find many reviews on this company anywhere (Platinum Properties Group - if anyone has ever used them).

I am unable to use a traditional cash out refinance due to unquantifiable DTI ratios.