The tenant asked me to find a system where I can report his payment history so he can build his credit.

Renting by the room can be logistically difficult, but the potential for higher returns makes it really worth considering and putting in the time to come up with great systems for handling it.

She just knows the system very well being a professional tenant.

No other system I've used has taken that long.

When people usually become agents they are excited to work with people, and for good reason but they don't set up their systems. 

Is the Covid-19 situation making this system more or less lucrative?

Of course, this only gets you some operators/developers and working for larger companies you tend to be pigeon holed into a very specific role, often with very efficient systems and processes. 

Any thoughts on leveraging the BRRR system?

We have a system made up of a huge complex set of rules and regulations.

But I'm using my time productively to learn and work on systems.