Then there are many lending programs here in the states that only require 25-30 % down with no experience only that you are a homeowner.

Could be that most landlords have a negative experience because the local housing authority is very anti-landlord. 

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It's wonderful to see someone with your enthusiasm and experience in real estate investment.

My experience mirrors the saying "one bad apple spoils the bunch".

Both seem to have strong real estate markets, but I'm not sure which one would be better for a beginner like me.Can anyone share their experiences or insights on these markets?

Existing mortgage experience and relationships.

The comment that @Greg Scott made is intriguing, because his experience is that those two units make a big difference in how the deal is done, from the business plan onward.  

After this experience, I wouldn't even consider if the property wasn't in a landlord friendly state. 4) Hire a contractor based on value, not price.

I imagine myself getting into more rehab intensive (possibly even BRRRR) projects as I build my portfolio and experience!