People, even in this economy, would give you a healthy penny for it. 

The people I rent to don't like 20 year old appliances.

First, build the actual business in theory with a brand.Second, go to every real estate investor meetup in the area and see if this is something that people would pay for and if so, how much.

If two people own a property ( they are both on the deed ) and they put the property up for sale.

It is, because in the end people let you down and over promise and under deliver and to tell you the truth cause I've dealt with so many now, some agents are very good and they listen as to what your buy box is and they provide comps and an ARV analysis and other agents aren't willing to do sh!

High vacancy, lots of uncollected rent, high evictions, and long turnover times (as a result of slow turnover process or poor marketing/placement to fill vacancies) are very common results you'd expect from a bad property manager/landlord, which will lead to this "no tenants" issue.

I know a lot of people here both on and accepting Section 8 and I have never heard of them refusing to pay legitimate rent claims. 

Yes, many people do.

Nevertheless, I think if more people are talking about it, we can all work together to protect each other from any nefarious operations in our industry.

People call me from all over the world to invest in real estate.