I've found conflicting information online.

You don't need to buy a car dealership, it can be a side hustle or an online business.If you try to get more rent than fair market, you will rent to desperate tenants, who got rejected everywhere else.

There are also many online calculators you can use if you do a search for them.

@Matt Wan Many lenders require wet signatures on at least the Promissory Note but if yours does not, as a US citizen you could do the entire signing anywhere on the planet with a good internet connection + mic + camera via Remote Online Notarization (RON) for less than $200.If wet signatures are required, the answer then depends upon what foreign country you are in.

I volunteer and host an online group for our local chapter of the Real Estate Investors Association (REIA).

Networking with local real estate groups or online forums could help you find recommendations for PM companies that have a proven track record in Birmingham 

If you want to send me a DM I can send you a link to run an easy online quote

It will be easy for you to check if they paid on time, as you can check instantly online.  

This owner found a free lease template online that provided very little landlord protections. 

While you are figuring it out and/or deploying it over time, US Treasuries and certain CDs are paying 5%...and 4% for certain online savings accounts.