You will need to play with numbers, areas, and types of property but it can and does work.

I would probably just jump on the BP calcs and play around with them along side redfin or zillow and input real numbers into those areas.

Frost depth will also play a part in this as well.  

For some reason the @ feature doesn't play well with my phone. 

Completely evades the subject, but you are a little wiser that she might not always play by the rules...

Other issues that can play a role are various consumer protection laws, but I really don't know anything about Florida law on that issue.

Of course the type of window and siding materials as well as nterior finish materials will play a factor.

Patrick, play your game not his.  

If you're looking at a play for buy and hold but looking to sell and cash out down the road (as in many single-family home investors), it may not  be viable in this niche.

As I diving more deep into emerging markets looking for value add plays with multifamily apartment complexes Im learning a lot about how to spot an emerging market with specific key indicators which is very helpful of knowing when to buy.