Which ever market you choose will depend on your strategy and how involved you are going to be.

I looked at GPS tracking, but they need batteries changed frequently, and a monthly fee to be paid like a cell phone bill, any ideas would be greatly appreciated.

Grocery stores would be empty within 48 hours unable to order from their JIT supply, credit cards not working, not sure if we could maintain the electric grid, cell phone system gone - who still has a landline?

The ruling on commercials is that 1 unit OR 25% of the units on the lot, whichever is greater.

I found this for my city: "For the units covered only under California rent control, annual rent increases are capped at 5 percent plus the cost of living increase or 10 percent, whichever is lower, for tenants who have occupied the unit for 12 months or more... 

For sure whichever market I decide on (I'm between IL, MI, and OH at the moment), I'll spend some time visiting.

Whichever you prefer - there are pros and cons to each and I talk to investors who do it both ways 2.

However long they can hang on for or until it isn't economically feasible - whichever comes first. 

Purchase the crammer course through hondros or whichever school you took your classes through, it's helpful in narrowing down the information for both state and national

Whichever PMS (property management software) that you use make sure it integrates with your lock.