Cost of replacing a flat roof? (North Central Florida)

[Jennifer Turner]

I am trying to put an offer on a BRRRR property in Florida. It has a very old, original flat roof that we would like to replace asap. None of the local roofing companies have time to look at it and get us an estimate for at least another week or two. Can anyone give me a ballpark idea of what kind of cost we should budget for to replace it? It's a 1,492 sq foot single family house in north central FL. Also would it be possible (affordable) to replace with a pitched roof? We've never dealt with this issue before and want to get an offer in asap.