Would you please send me the proper link to get the charts and other information? 

I pay an accountant well to make sure I have as little profit as possible :)For a small operation Google Sheets could work. 

I’m 41 a mom of 3 and working on paying off my second home through owner financing.

Some great answers, my intent would not be to spend the $$ on the investment property but to pay off the mortgage on the primary.

Or did you pay cash like Dave?

There are investors out there that put large amounts down, such as 50% or more and those that pay cash.

Speaking of networking, I'm currently looking for an attorney & CPA to help with a proper corporate structure for my current situation and plans.

The duplexes had 3 of 4 units rented, and only one tenant is actually paying rent.

Insurance would cover it, I would pay the deductible, and no assets would be lost.If you are in an area like San Diego where people are more likely to sue, a judge is more likely to find you guilty, and the payout is expected to be higher, you may consider an umbrella insurance policy.

So now my next purchase is going to be solely with the goal of cash flow in mind to help offset what I'm currently paying out of pocket.