If you are obtaining financing, the contract will already be contingent on that. (and should already say that), also have your lawyer read it before you sign anything. (always get your own lawyer). Secondly, good luck with the 5 day clause. Usually in Short Sales, the sellers bank dictates most of the terms. As long as you have your lawyer review before you sign, you should be okay. If there are changes to be made, your Realtor should be negotiating for you. Good Luck and hope you get it.