Nicholas Nassim Taleb helped me get there too.I find cashflow mostly a present gauge and thus much more highly accurate.

Quote from @Kevin Zmick: When a property doesn't rent, there are two primary reasons: the price is too high or your marketing isn't reaching the right audience.If your REALTOR listed it in the MLS, then it's probably syndicated to the best websites and you're casting a wide net.

The redevelopment also includes 250,000 square feet of retail, park areas, and a transit hub, which will make homes near the redevelopment highly desirable for future buyers.

It the accessment is too high and the real estate taxes as a result are too high, the net will be less. 

The problem, like anything online, is that the auctions get bid up so high.

I was wondering how should I do high level estimate on cost of construction for homes.

A lot (not all) of new people are so eager, but this is a bad time to be eager with high rates and low inventory across the country.

We don't have the Midwest weather, high property tax, old homes, high insurance, high maintenance, or state income tax.

currently I am using free skip tracer but It didn't work most of the numbers are all wrong or didn't connect at all. I'm thinking to use something that need to be paid or if there is a great free website let me know ....

BiggerPockets also has a calculator to analyze deals, and I highly recommend you start this as soon as possible, even if you are not ready to buy.