Nice to meet you Renee,This question is very difficult to answer without understanding end goals. 

Sold it recently to make a nice profit.

Go to Etsy and search for "rental property tracker," and you will find hundreds of nice spreadsheets to track 10-20 rentals, usually for under $10.Software has extremely helpful features like online payments, marketing syndication (click a button, and your property is advertised on multiple sites), electronic document review/signing, maintenance tracking, and owner reports.

If you want to be nice, don't charge a late fee for the rent as she pays it late over the coming weeks.

I live in a tent by the river with a nice little otter,  and don't even own a shirt.

Of course, easier said then done, and evictions and issues/extra expenses pop up, but if you keep the long term vision, it tends to build on itself quite nicely.

I'm about to use about that much to buy me a nice little 6 unit.

Go to Etsy and search for "rental property tracker," and you will find hundreds of nice spreadsheets to track 10-20 rentals, usually for under $10.Software has extremely helpful features like online payments, marketing syndication (click a button, and your property is advertised on multiple sites), electronic document review/signing, maintenance tracking, and owner reports.

Pretty tough to get a B home in a nice neighborhood to meet the 2% rule. 

Even wholesaling or flipping requires contracts, and you're not old enough to sign.There are a lot of young people looking to start, and it would be nice to hear more of your story and how they could follow your process.