I too live in Florida and just used the skyrocketing appreciation to turn my current home into a rental and purchase another place. I understand what you say about FL real estate still selling but you may not be able to get your price (no matter how much lower than last year) and sell it quick at the same time. I'll say this - PLAN on it taking twice as long as your worst estimate to repair and sell the house. There are always factors that you cannot control - took me 6 weeks to get a window I ordered from a major home repair store. Cost? $342 for the window, ~$800 in mortgage payment and utilities. Expensive to "update the look" and provide a "nicer" rental to justify a higher price.
In your situation I think I'd ask at least half a dozen different realtors what the average time on market for their listings and plan on longer than that. If you can't manage that long then it may be time to think about hitting that corporate grind for another year or two until your credit has cleared up and you can make the "jump" in a more controlled fashion. You may also want to consult a tax attorney/preparer and find out what downsizing may do to your tax obligations... that appreciation may come with a pretty good size cap gains tax.
I will also say this, I'm making those 2 payments but it hurts... Hopefully I'll finish the repairs and have mine rented before the end of the month but my wallet and credit will still be sore for a couple of months afterward. Consider what having NO money to spend on dinner out at McDonalds will do for your wife... and how long you may have to tolerate that position.