Make sure it is fully functional; VERY clean, including windows and screens; and a fresh coat of interior paint if it is at all tired or multi-colored or just "lumpy".

I think a combination of content and sending letters to people who are likely to be motivated will give you the results you are looking for.

But the two combined are taking up way too much real estate on my phone screen.  

Yield in any investment vehicle is a function of risk.

With the amount you're saving currently combined with the extra per month after you have the debt paid off, you'd have enough saved back up in no time to buy a decent property.

Because real estate doesn't function the way most real property does. 

It then combines it with similar risk levels of other MBS and resells just that portion, called a tranche, to other hedge funds.All goes well until housing prices decline or interest rates reset and the mortgages start to default.

If you use a channel manager and a pricing software that take a combined 4% of revenue, which would be pretty typical (Guesty + BeyondPricing), you would be paying $400 a month. 

They had a calendar update function on the app but it has since gone away.

It could function as a duplex and you could rent the first portion out for probably a little over 2000 (four bedrooms, two baths, finished basement) and live in the back.