Is this a strategy that is commonly used or is the real estate commission worth the saved time/effort?

I think that’s very common and is a great goal for a lot of newer investors.$200/month can be the start of something much bigger.

There's also common variations in the spelling of the last name.   

I'm encouraging seller-financed noteholders to consider small partials as a way to raise cash. 12 - 24 months on 60+ outstanding payments will result in a minimal discount because, in the most common partial scenario, the buyer is buying near term payments and taking less equity risk.

I would rather have at least one bathroom open up to a common area for access to everyone. 

If she doesn't act on the advice and continues to see this person (which is common), I don't want to have to inconvenience my other tenants by changing the locks again.

Common sense! 

I am using my common sense; when it comes to an estimate.

I also prepare some canned responses to common questions because I usually get a bazillion messages. 

In San Francisco, it is very common to invest in properties where a lease was lost, never existed to begin with OR the tenants are not willing to share with you their copy.