Even though there is a tenant there now, the association could restrict or limit renters there.

You'll need good contact info for them to be able to collect, and ideally the new address for the tenant however which if you don't have can probably be found easily with some online sleuthing/ contacting their employer, skip tracing software, etc. 

But I would imagine the credit card companies would start to restrict me at some point.

A specific property you find online would be even better.

Santarelli allegedly purchased from a government auction from the bankruptcy trustee and relaunched online.

A friend advised me to check reviews online and look for someone local with experience in single-family homes.

Each town is a little different, some require you to do a landlord registration and/or will want to do an inspection before you put a tenant in (calling the town would probably be the easiest, or they may have the info right online).

Recommended resources include books, podcasts, websites, forums, and online courses.

We use Quickbooks Online for our main accounting software.  

@Ryan DaultonFrom my experience, the best way to find partners in real estate is through networking events, local REI groups, and online platforms.