The main issues I see in Portsmouth is to thoroughly do your tenant background checks as I see a lot of people kicking doors when trying to rent.

Make sure to check out @David Pere's Military to Millionaire.

Obviously there can always be exceptions, but that is not the standard or common deal. 

Definitely would check!

That’s slow by today’s standards but while this was not pre-internet, it was pre-“everybody’s doing it”.

Never dealt with sound proofing so be good to check that out.Good luck.

Electrical outlet is only a few feet away.Just to confirm the standard anode is usually 3-5 feet long making it very hard to replace when the HWT is sitting on a 1 foot stool, correct?

I checked Redfin and I'm seeing properties at around 75-90k a door.

Why hold in Baltimore when you can hopefully get it vacant, sell it, and use the money for another property closer to you or use that money to build an ADU.Have you checked the regulations on ADU and impervious cover for your house?

There should definitely be options for you using DSCR which many lenders will count your STR income either based on projection or your rent roll.Also, check local banks instead of brokers.