@Guang Yang online travel agency. i.e VRBO

After some research online, I am reading that the cost per square foot on a gut renovation of this nature in Stamford CT is anywhere from $150-$350, which is ultimately not very helpful, because at $150 per sq ft, this is a very appealing project with a total profit of ~$175K (46% ROI) and at $350 per sq ft, it very much isn't, because it would be a net loss of 83K (haha).QUESTIONS:What can I do refine my estimate a bit given that I am not allowed to a formal inspection on the property? 

Any recommendations of online companies with these services?

Method of choice was looking for potential properties online using redfin then when I had run simple numbers I would drive by each property and its neighborhood and if it was worth pursuing, I would schedule to see the property through the selling agent.

Do we just have a written agreement between father-son (is there a viable legally recognized agreement online to use)?

Saw this program on Facebook today.Like all online coaches, I question if someone is bringing in millions of dollars, why do they need to be hawking a $5k course?

I'm shopping and ordering online given that my apartment is out of state and I'm flying in to set everything up.

I left my job 2 years ago to help me and sister build a online business.

In online forums, the danger I've experienced is the "national" effect. 

I ended up getting the online course and it was pretty disappointed.