I have really mixed feelings.

On one hand, I want to congratulate them on getting their dream....on the other hand, as someone who regularly has to tell the receptionist to screen my calls....

Yeah. This is really a tool to collect prospects to spam and cold call. I'm sure it will last the OP awhile, possibly it'll be a project that survives forever with different data sources, but at the end of the day "lead generation" is really just a way to collect people's information to pester them. This sort of marketing is, frankly, invasive and for every person you get from this...you've also likely convinced a dozen or more people never to have anything to do with you.