This is not really a legal question but a finance management question. You should definitely talk to a qualified mortgage broker/loan officer who can advise you (I believe that you are required to meet with a HUD rep). One of the major pitfalls associated with these types of mortgages is that they have reltively high closing costs and could impact eligibility for medicaid.
I hope this helps.
Disclaimer: This answer is for informational purposes only and does not constitute general or specific legal advice, nor create an attorney client relationship.