I think being full time helps. If you have a good idea, you want to continue with it and see it to a reasonable conclusion without being interrupted by a job that takes your attention away. Coming back to the idea to continue the work, sometimes you don't quite have it anymore even with good notes
Even just a few ideas properly researched/analyzed/executed can make up for the loss of income from the job through compounding over the years and put you ahead, maybe significantly ahead
But I understand the point about working some easy, work from home job that leaves you plenty of time to invest, and the job providing income and a nice break from things
So it depends on what kinda guy you are, some guys smoke Marlboros and some guys smoke Newports