I agree with CH, it appears you should have a serious discussion with your mortgage broker.
Massachusetts Premier Buyer Brokerage
Also, It seems that you have issues with your mortgage broker here. It is the broker who should have made sure the building is FHA approved.
I would voice my concern to counsel directly here, and see if s/he will accept your decision to fire them first. Please keep in mind that you may find yourself in the same situation with another lawyer.
Best of luck.
Please consult my counsel for more info: Ali Alavi. firstname.lastname@example.org
I do think you could change attorneys, just consult with someone else so they know the full details of the situation and you know their fees. You will owe the current attorney fees for what he/she has provided so far (P&S review, etc).