However, I'm worried that using the word "investor" will instantly turn sellers off, and I'm also concerned that people who don't know what I mean by "owner-financing" will ignore me. 

Break the lease and ignore their responsibility.

Every single time a person posts about an Airbnb or short term rental, you have to put some ignorant remark.

When I called him (he did have an area code which fit where he claimed to be from), he had a pretty thick African accent (now, I know there are a lot of different countries in Africa, but due to my ignorance, I can't intelligently suggest where specifically he may from).

I am going to ignore the tax portion and talk about the investment...I LOVE that idea. 

Ignore all the advice so far given until to sit down and take the time to learn your state landlord tenant regulations.

But not up-front money.But to explicitly answer your question, I've personally never heard of either of these, but there's a lot out there I've never heard of, so my ignorance doesn't necessarily mean anything.

Doing great in a couple markets and ignoring you can go wrong in a new market.

If she "won't do anything you say", she doesn't sound like a very cooperative tenant and I would not feel bad one bit about her inconvenience for a few days over ignoring your instructions.How long will you be gone? 

I just dont concur that 100 percent of the Amazon employees will live in every place you listed but on a 100 percentile basis will all ignore Prince George’s County with full knowledge it’s the most affordable place on that list.