1) Goto https://entp.hud.gov/idapp/html/condlook.cfm and just put in the zip code. Try to find the complex on the list. If its on there, you're golden, if not, you'll need a spot approval...goto #2
2) Do a search for solds and add the field 'complex/park". Justput a portion of the name in and use the 'contains' option. Look at the last 10 solds and see if any where financed with FHA. If so, you should be able to get a spot approval. If not, goto #3.
3) Have the lender call the HOA to determine the possibility of a spot approval.
You would want to check the following:
1) What is the owner occupancy in the building? You can get this info from the management company.
2) What is the percentage of delinquencies ? Also management company question.
3) The most crucial is checking to see if the building is FHA approved. Have a lender you trust check to see if the building is approved. A lender I work with who does alot of FHA/VA loans is Linnea Arrington with San Diego Funding. 619-260-1660. She would be a great resource for you.
I would do the above first before doing any further negotiations . If any of the above fail the test you won't want to persue a FHA buyer.
If the building passes the above test, then you should speak to your broker as to how to protect your seller.