You can pay cash, but the condo board may still refuse to allow you to move in if you have bad credit.
I recommend you have your credit repaired before trying to purchase a home.
Be very careful ... lots of shysters out there trying to take advantage of folks.
If you are interested in doing this, I refer all of my clients to an excellent attorney/law firm that focuses on credit repair so they do not have to help you file a bankruptcy.
Please call David R. Weiner, Esq. at Michael B Schulman & Associates.