I don't want to sound like the voice of doom or gloom here, I just want you to go into any and all of this with open eyes.
1st thing I would suggest you do, is contact the landlord and see if they will extend your lease 3-6 months. Let them know you intend to purchase, but need some time to get things in order.
2nd contact some Mortgage brokers. (Countrywide, Integrity Home, places like this) They are in the phone book. Let them know up front what it is you are looking for and see what they say.
3rd. I know this is going to sound strange. When you made that large pay-off, your credit score droped. Now yes, it will raise but that usually takes 3-6 MONTHS. If you can, write to the company and request a Letter (on their Letter head) stating that your debt to them is clear.
4th. Before you agree to go with any lender, know what they are about. I'm sure you are aware of the problems that have arrisen in the last year with MANY lenders.
5th Try your Bank. Many banks offer Mortages, it is just not their mainstay, so they don't advertise. If you have been a customer of theirs in good standing, many will take the risk when others wouldn't.
I hope this helps, good luck.