I obtained my mortgage broker license, the required course was about $500, and took 3 days (8hrs/day). The test was a bit tough, but I also had no background to draw from. By the time I was "all-in" I had invested about $1000-$1100. I made $1500 on my first loan alone.

It works out nice, as most all of the work can be completed remotely so I can work while sitting at an FBO.