I took a contractor in for rough estimate on a full gut rehab before making the offer.

no estimates - the actual numbers.  

Which site is the most accurate to estimate the fair value of the house based on your experience? 

The area shows high rental estimate on the bigger pockets rental estimate tool.

I get $2,600 rent and I get approximately $300 cash flow monthly.

Hello, I am new to the community and this is my first post.I secured a multi family lot to build approximately 16 condo units on.

(And yes, I know the phrase “man plans and god laughs” but this is just some rough approximation for a place to start thinking about this.)

You still have to run comps on everything, determine construction costs & estimate ARV, carry & commission costs, etc to make sure that deal in that market makes sense.To do that last portion better, I use Sales Comps and drilled-down market stats. 

If I rent it, it won't cash flow more than 2%, which is sort of ok as my goals is creating a portfolio of additional income for retirement (12 years from now)  If I sell it I will likley lose a little money ($5-$10k) I Used a VA loan to purchase zero down and will be living in it for 24 months while I do the rehab.purchase price $330K, rehab $15k, Estimated ARV is $370k.  

The principal, interest, taxes, and insurance (PITI) might be approximately $850.