I would go on furnishedfinder.com which will allow you to look at MTR's in your area, see what they rent for, and see how many are "available now" vs at some point in the future.

For future reference, what @Charles Carillo said is very good advice.

Both properties have a substantial amount of equity that’s essentially sitting idle.Would it be a good idea to tap into this equity (through a HELOC, cash-out refinance, etc.) to fund future fix-and-flip projects or purchase additional rental properties?

During this time you are not generating any return from the money invested in the ADU.

There is some future Infrastructure improvements taking place, which can/cannot impact the property ROI. 

We are not looking to conquer real estate but just start generating some passive income I hope this finds you all well.

A new future real estate agent and real estate investor here!

For context, downtown Alexandria performs super well as a rental market and bringing in $5.5k+ as the monthly rental income if you choose to move out of the househack in the future will be absolutely feasible (depending on the property of course).

When you have enough data over a long period of time, there should be enough to generate a useful score. 3.

The electrical panel is original, so an upgrade might be needed in the future.