Sounds like it's been vacant for a while based on your narrative.

Closing costs vary based on State and County for Taxes, Insurance, Doc stamps, transfer taxes, Title, and every Bank/Lender requires different points/hard costs.If you have any specific questions of if your just getting started feel free to message me or reach I out. 

If there is enough equity at the 6 month mark you could do it then but there may not be much of a tangible benefit unless there is a PITI savings.If you are able to do some renovation in the first (6) months it might be possible to do it on the 6th month mark based on a higher renovation ARV.If you have any specific questions feel free to message me or reach out I am always happy to help and talk REI.

Those use a AVM based off Zillow or electronic records on file.

We thought it was an ideal house to STR - and it would have been just based on the location, and perhaps the experience of staying in an old home.

I'd recommend looking at Kyle Stanley's 'Fearless Flipper' on youtube - he's based out of Fresno.

where's the city this is based in? 

We might be able to give you some more advice based on that location.What time of year will the folks be staying there?

I know I will eventually be looking into Disney but I've always been curious about overall annual cashflow being that the market is based on nothing but the theme park market. 

My numbers are conservatively based on 3 STR's I already own in this market.