Should I buy something from the 1940s?

[Rajpuneet Singh Sandhu]

I live in the Greater Detroit area of Michigan and from my quick analysis so far just using the 50% rule I have found out that only the properties (single family homes) which are from the 1940s and 50s located in B, B+ neighbourhoods which have the blue collar population are priced such that I can get a positive cashflow and if I look at something even as much as 30 years old, it's either a negative cashflow or very CoC return of just 4-5%. So, my concern is properties built until 1970s 80s used asbestos for insulation and siding and it's very likely that most of the properties I am looking at would have it. Now, I searched through the forums and people are saying is asbestos removal is very expensive and if you don't touch it, it won't bother you but what I think is, if something was built 80-90 years ago and if not today then 5-7 years from now it could have problems with all this asbestos stuff, what then? I wanted to hear everybody's thoughts about this.