Some of these cards were 0% on just purchases, and some of them had balance transfer checks that could be deposited into the account and then wired as my portion of the down payment on a property.  

In my world there is a balance between maximizing ROI and generating a decent income with minimal headaches.

Sounds like that’s a goal you set for yourself, and then achieved.

I also have been coming up with ideas of systems to put in place to assist me in my land lording business.Soooo... my questions are 1.Does this seem like a solid and achievable plan for a newbie with not a lot of capital?

Rent Roll with specific dwelling number, name of resident, move-in date, monthly rent, amount of deposit held, current balance, additional charges, number of occupants, and a brief history of the resident (good resident / bad resident, special circumstances, etc.)

You will need to be able to strike a balance of professionalism and compassion to truly succeed.

That's where I'm trying balance spending too much on interest vs adding more properties.

The only option we've found is to:- Send to collections now for current outstanding balance - File for eviction if/when we can finally do that again - Send to Collections for final balance after eviction I don't foresee this doing much of anything in the short-term other than getting the inevitable collection process moving now.  

You need determine what your goal with investing looks like, only then can you determine what type of properties will help you achieve that goal.

I just do a sanity check on mine once a month to keep current.Its usually on a few pages and automatically aggregates into a  nice balance sheet showing debts, assets, and owners' equity.