Facebook Ads would be where I would start. You can get extremely targeted with your ad exposure and it is quite cost effective. I'm assuming your Investment Club would have a one-time or annual cost. What you would want to do is create an asset (content) that would appeal to your target demographic and create an automated nurture campaign to introduce them to and enroll them into your Investment Club. Set up the automated funnel, start spending $20-$30/day on Facebook ads for 2-weeks to test the funnel, tweak & optimize, and once you're generating an ROI (ie: put $1 in get $2 out) you can scale up your ad spend and spend a couple hundred per day. That is about as close as you can come to printing money. Hope this info helps! Happy to elaborate or explain further.