Hi Brooks,There are really 2 ways to evaluate a single family fix & flip:  70% RuleDetailed Maximum Purchase Price Analysis70% RuleThe quickest way to analyze a flip is to use the 70% Rule, which basically allocates 30% of the ARV to your Buying, Holding & Selling Costs and Profit.70% Rule Formula:   Purchase Price = (70% * ARV) - Repair CostsExample:  ARV: $200,000Repair Costs: $50,000Purchase Price = ($200,000 *.70) - $50,000 Purchase Price = $140,000 - $50,000 Purchase Price = $90,000Detailed Maximum Purchase Price AnalysisThe slower, but more accurate way to analyze flip deal is to perform a detailed Maximum Purchase Price Analysis.  

There is no way appraisers are this accurate.  

Etc...And then I use the data from those trends to modify my future estimates/predictions to make them more accurate and precise.Saying, "it's just luck..."

I have no one I can accurately talk to this about in person because no one I know is a REI, and they say "take advice only from someone you would trade places with."

The forums are nicer these days as back then there were a lot of old time investors on the site and you would get eaten alive if the numbers were off.I simply absorbed everything that was said and kept learning on my own until I felt I could contribute to a conversation accurately with numbers and pay it forward.

These are a lot less accurate than the wall mounted thermostats and also discourage people from adjusting/ turning them down since one has to get right down to floor level to adjust.

After ten years, I find the most accurate predictor of the type of tenant they will be is the type of renter they have been in the past (sounds simple I know, but all the other factors are built to predict this, so if you can probe rental history, you can find out alot). 

You will still want to use the income approach in valuing the property.In coming up with an accurate valuation for the property, you need to drill down on the income and expenses for the property's operations and then capitalize that figure using an appropriate cap rate for the area and product type.  

Accurate enough that you can quickly scan deals and when it looks like it might work, it does?

Does FEMA has new base maps that is better and more accurate then what they had before, or did something else changed in their models such as vertical datum etc...?