If I take an early morning flight out of Phoenix, it's about 4 hours (arrive 3pm, leave 7pm). This is a little tight for my preferences, particularly if my inbound flight is late. I think I'll come in the day before and get a cheap Priceline hotel for one night. I have one day left on an old Disney World Park Hopper pass, so I could go there in the morning then head out to SFB that afternoon. Thrifty has a one-way rental from MCO-SFB for $28 for one day (with the Orlando Magicard).