Get a better lay of the land before planting the roots. 

I'd be worried if people were coming to the home for his business, but if he's simply using the address (same as a PO Box, though to me that would send up a red flag for a business to have a Box #) I wouldn't worry about it.

@Steven Moore there's a lot of red flags with this deal.Why hasn't the seller raised rents?

Not as the red-headed stepchild in the real estate industry.

This time the handwritten letter is in red ink: "Hey mon I tried several times to reach out.

I've caught so many red flags this way for my clients.

Tenant also agrees to the following:-All drains, waste pipes, and plumbing are accepted as clear by Tenant at the time of occupancy, and any material blocking them after occupancy shall be repaired at Landlord’s cost, unless determined by repair person that such blockage occurred during the time Tenant controlled the Premises and due to some fault or negligence of Tenant, specifically excluding blockages caused by roots or backups from the street.

Ignoring Red Flags: Pay attention to potential problems highlighted during inspections.3.

He put in a hot water heater, painted the upstairs walls white, put black shutters on the house, painted the deck grey, and painted the front door red.

Is this a red flag?