I am always looking for good sources of information, which I might share with our friends who are reading.

That being said, all of these lead-generating companies do the same thing and often use the same data to source contact information.

Just ensure the cost data sources are very clearly documented.

However, I am seeing more interest in MTR's and have a colleague that does well buying condos and renting out to traveling medical workers and foreign exchange students.  

Foreign investment? 

And if this is illegal in some states...what exactly is illegal about finding interested investors and matching them up with a funding source?

Check out traceestate.com I have been using them and the sourcing company that they incorporated for the last few years.

And usually you have to be self sourcing them or doing some serious turnover. 

This question crossed my mind recently after reading a post and some comments discussing whether an investor is experienced enough to raise capital from outside sources.

When trying to analyse STR I try to use as many data sources as possible, AirDNA, Rabbu, Pricelabs and good old networking, ask around see what other investors are getting for their units.