This is also why I cry myself to sleep 3-5 days per week. : )

Tracking all income and expenses on everything you are responsible for and review them regularly so you can hopefully reduce expenses and increase income.By the way, I'm now 60 years old and quite opinionated.  

We do regular maintenance inspections to catch leak problems and try to prevent leaks by replacing water lines before they wear out.

But, once you have this binder in place you will sleep well.

Then each of our Consulting firms will show a $25k profit, and our Flipping LLC will have around $0 in profit.This is good because our Consulting firms are S-Corps, which will alleviate our taxes (compared to regular LLCs).

I have a health condition that forces me to sleep well and keep stress low.

To go a little deeper on what Tony said, your regular payment won't change with the 5 year balloon.

I'm 25 so my regular career is only now starting to become successful and I'm at a point where I want to save and earn money instead of blow it all so I'm starting to work on the RE portfolio. 

Track all of your expenses and income listed in a report and review them regularly with 3rd parties to help reduce expenses and increase your income.  

Track all expenses and income on the properties you own and review them regularly and try to cut expenses and increase income.