Plus the fee's they can make looked very attractive..

The insurance industry calls them an attractive nuisance and they add a lot of liability.With a 4-plex, it seems you have the worst of both worlds. 

We would not have been able to attract a single investor with that strategy.

Hi,I'm currently considering buying a single family residence.I have some questions,1) Which is more attractive for students, a single story house or two story house?

Maybe you could find them by doing a widespread direct marketing campaign, but then you would need to add those costs to your property to properly account for it all. 

Long-term mortgages are funded by mortgage-backed securities and, to attract investors, they would have to provide a return that is North of what they could get "risk-free", meaning the Treasury.

In Kissimmee, that's already happened.  9br homes in Champions Gate were $900k+ a couple of years ago, now available in the $600k range or a little bit more with theming already done.With prices dropping a lot, the returns relative to gross revenue are starting to look attractive. 

If you are not getting showings, you are not attractive.

COVID created a chaotic spike in both the sale & rental markets, attracting even more new real estate investors.

The agents and investors who thrive are the ones who learn how to attract leads, build a brand, and market themselves consistently.