There seems to be some confusion among the answers whether they are talking about when the Seller is able to get a loan again or when the Buyer's loan process begins. I am assuming you are interested in the latter.
In Florida, the latest and most Short Sale Addendums state that the loan process begins for the Buyer once the Buyer receives the Seller's Lender(s) written approval of the "Short Sale". Usually 30-45 days is the max most Seller's lenders will allow from this time frame to close.
As Steve said earlier, you should have met with a lender to get a pre-approval letter to present with your offer. Most Listing agents and Seller's Lenders will not considered an offer without it. It is just as important for you also, to know what you can qualify for and comfortably afford. Once it is approved your mortgage broker will want to pull credit and start processing the loan immediately to meet the time lines, while you do inspections. Once your inspections are done they will order an appraisal and then your survey. Everything in order so that you are not paying for a step until you know you are moving forward.
Since there is a lot to do in a short amount of time, after waiting for possibly a long time, it is very important that you get all the information your mortgage broker needs to them as quick as possible. I suggest getting it all in during the waiting period, then you will only need to update a few parts.
I feel an informed client makes the best decisions regarding their real estate needs. Let me know if I can be of assistance.
Broker Associate, GRI, SFR, CDM, NHS
Real Estate Consulting, Marketing & Sales
Prudential Tropical Realty
2539 Countryside Blvd #3 Clearwater, FL 33761