OK I do have a little expertise in CA on these issues..

You need an income that meets three requirements:Rents increase faster than inflation to offset constantly rising prices.It must be reliable; it continues even during economic downturns.It must last throughout your lifetime.These are all long-term requirements, so the current interest rates are not the major issue.

I’d love to hear about the crime rates or any other issues (which we cannot guess from the online stats), and how easy or hard it is to find reliable tenants and property management companies.

I'm noticing a lot of homes with foundation issues. 

Most negative comments come from competitors, those nitpicking minor issues, or people who haven’t worked with the company at all.

Typically, co-op's are less valuable than condos for a number of reasons such as supply/demand, lack of investor interest, older units, estate planning issues, financing and board policies. 

I find that it's almost a one stop shop in that I can use it for my business checking and savings accounts, bookkeeping, for rent collection, I can issue virtual credit card, I can create all the financial reports I need to run my real estate business and prepare for tax filing and through their partners I can vet my tenants, develop state-specific leases and more.

The other non-math issues I'm good handling myself. 

I do own two triplexes in Scranton, and I will say the one issue is that you are going to be taking care of the utilities normally if they are not on separate meters, which could take a good amount of money away from your overall cash flow. 

Team of people watching notifications and contacting guests and if necessary going out to property to address issues.