If I choose to not renew and there are damages or he doesn't pay his last few months (he has about 3 months left) what are the simplest actions to take to collect the rent owed or money for damages?

Feel free to pm me and I can provide their contact details.Sounds like a solid plan to me, now, just have to continue that daily consistent action to put it in place. 

I have spent the better part of a year learning as much as I can and feel like it's time to take some action. 

It discusses the art of neutral thinking and overcoming challenges by getting to the truth to determine action.

Happy Holidays to my fellow DMV investors. Here are some interesting recent stories from the D.C. real estate world and beyond.
DC Council Takes First Vote on Ward RedistrictingApartment rent and occupancy set new re...

So the old homes were sold to canny investor types who quickly converted them into duplexes and filled them with black folks eager to get out off the Hill and white Appalachia hill folk from the surrounding areas looking to move into the Pittsburgh metro area.As the municipalities began to catch on to the fact that any sort of old home undergoing a conversion to multifamily was bad news for the area, they passed ordinances forbidding the conversion of single-family to multifamily.

Donnie Walker was one of many speakers to speak high praise over the growth that’s made the arsenal boom.The FBI reported they have more than a thousand employees already moved to Huntsville, with multiple facilities being built to train thousands daily.The Army Materiel Command says they’re hard at work streamlining the industrial base in a way that would modernize the entire Army.Marshall Space Flight Center, a key player for the SLS launch this coming February, is preparing to help launch the most powerful rocket ever built by NASA.WATCH HERE https://whnt.com/news/redstone...

other investment opportunities (other than a flat out loan at a favorable interest rate) seem pretty fraught with peril as you will need your sister's consent and participation to take any action that would allow you to realize any gain, including a refi or property sale.   

And what course of action would you recommend? 

Great to hear someone at your age jumping in and taking action.