This is where the middle man markup gets inflated, repairs to bad work gets delayed, and where quality goes out the window.

One even has an inflatable hot tub in it.

and the building/land is most likely going up in value, at least keeping pace with inflation and possibly doing even better as the location becomes more desirable. 

I’ve seen many inflate numbers and dump and repeat in my market. 

Just make sure you have enough room in the investment for an inflating interest rate if you decide to go the home equity route.Brandon

Just an FYI prices are inflated.

Many deals we see from wholesalers have inflated values, under estimated renovation costs and occasionally include multiple wholesale fees that can reach 10-15% over the contract price.We, and our partners, would buy deals in LA with a 10% ROI, however many that are brought to us with that return expectation, turn out yielding far less once we underwrite the project internally.My suggestion to you, if you haven't done so already, is to close, rehab and sell a few on your own.  

when using the spreadsheet or calculating the future estimate of appreciation, rent, expenses, inflation(as a percentage increase).  

Not 1990...1890 and discovered the inflation rate of return on a personal residence.Guess what it was?  

An ideal flipping market is one where properties sell quickly and property values go up at the same rate or even higher than the inflation rate.