If his roommate is not holding up his end of the bargain, he should encourage his roommate to move out and find a new roommate that can. until then, explain that they are both equally responsible for the entire rent regardless of which one is not pulling their own weight.

If they are that good and pay on time and take care of property, that's worth its weight in gold.

If that type of miscommunication happened, I would probably increase rent gradually over a few years until it caught up with market rate assuming the tenant is a good tenant you want to keep.

The *RIGHT* Realtor will be worth their weight in gold for these roles. 

Start a sensible weight-reduction plan...today.

A good contractor is worth his/her weight in gold.

I'm not sure if the 1% rule still applies, but with current market rent it seems to be closer to 0.5%.I've seen some of the more experienced investors buying SFHs and creating legal duplexes or triplexes but since I don't even own one property and have never been a landlord before I wanted to gradually build my way up.

An ounce of prevention is worth it's weight in gold!

What's the weight of it?

I self-managed for a long time then turned the re-renting part over to a PM and gradually turning full control over to a PM.