c) A twist on b is to just look up the info in your county's foreclosure search tool. 

Mailing post cards is expensive and not nearly as cost effective per deal as SMS nor as fast a response.Other tools that I have looked at and terse comments.

My name is MSOOTKAUG, but you can call me Overlord SEO.

SEO’s effectiveness, when done right, is proof that times are changing.

If you're handing out hundreds of thousands of loans to folks with below average financial literacy, i/o is a bad thing (& this is why HELOCs are harder to get than Fannie 30YF amortized).If you are a specific borrower, and financially literate, i/o is actually a good thing (there are full doc A-paper i/o 30YF mortgages, but not from Fannie, and harder to get).Interest only is just a tool.

What tools do you BP folks use to analyze short term market rentals? 

This is the time you make a wise choice, and stick to it, and crush it.Do you think I am happy I picked SEO and stuck with it?

◦Ensure tenants have the latest online tools to keep them happy.

They use it to entice and advertise, it's a marketing tool.

Whatever you do a mix of different strategies and income streams is always better than trying to make it work with a single tool.