Aside from the great statistical sites @Alex Olson mentioned, I would also hop on google maps street view and virtually drive the neighborhood.

@Daniel AnshusHaving that kind of razor thin margin is crazy-LOL  All you need is a slight pandemic and some non payment tenants and you are running a negative cash flow even on having a good sized portfolio. 

New Britain Still has quite a negative stigma, mostly due to crime.

I don't mean to be a negative Nelly or anything, but one thought I had reading the above comments is that it may take time to get enough cash flow to be self-sustaining, so you may want to consider ways to keep your wages as high as possible before then. 

Statistically, you're going to live to about 80. 40 years of doing nothing is a long time.

I found the following article on the Freddie Mac website to have some interesting state by state statistics.  

There are some people here who have some negative attitudes towards wholesalers but you will also find lots of people willing to assist you.

In Texas, free statistics can be found here https://4closure.info/statistics.aspx

I could show you through data/calcs how you could grow greater wealth investing in a 4% cap rate market with negative cashflow than a 9% average cap rate market over 10, 20, 30 years.

Are there any negative consequences even if he makes payments on time?