I have searched for properties and its the really old ones from the 1950s and older that appear to be high risk. I was think that since I have lived in homes from the 1970s and up, there would not be any risk of asbes...

You must pass the "Substantial Rehabilitation Test".  

I now have my days off to focus on the real estate company because a year ago I started working in the evenings and night as an addictions counselor for a local rehabilitation program.

As I am in my 70s I don't rehabilitate.

It might be different if you were buying NPN's and trying to Rehabilitate them as there is a larger upside.  

Further, recent developments make this point in time the best opportunity to grab the property while it has no value, as either its valuation will likely increase soon due to the development of adjacent property or it will simply cave in from lack of rehabilitation.

LendingOne is also becoming a relied upon source for the Buy & Hold investors.Our credit line will allow the investor to limit his/her capital outlay to only 20% of the purchase price and 20% of the rehabilitation costs as long as the combination of the 2 loans is equal to or less than 65% of the After Rehabilitation Value (ARV).

Rehabilitation is where profit is generated.

I wish to start with wholesaling and eventually grow to rehabilitating properties.

If they're "rehabilitated" or it was petty I don't care.