The biggest factors, from what I can tell, are age and rebuild cost. 

Average age is significantly higher, and there is less to do downtown.

BTW there is a free trial and the Starter monthly plan is $119.It also allows you to search through consumer information such as property owner "credit worthiness," Credit card usage, buying power, age, language, family members in the house, and many other fields that are above and beyond property characteristics, which is unique.

I think another factor here in determining whether its a good investment is your age and your goals. 

turnkey section 8 is not going to be like buying a brand new home there will always be differed items or stuff that does not work etc.. age of homes makes this impossible. then you add section 8 tenants and  there you go

Due to the age of the home and the appraisal we ended up closing at 10k less than the asking price.

We need to move away from dependence on China for both political and also capacity reasons as their population ages. 

For a rule of thumb, replacing a commercial boiler can range anywhere from $20k to $150k, depending on the size, age, and efficiency.

I helped an Invester from the age 14-19.

I have never been shy of facing challenges and I truly believe knowledge is power (something my grandfather taught me at a young age)I really want to learn everything there is to learn about realestate and am driven and hungry.Thanks in advance for any suggestions or recommendations.