The only thing you have to do to hit $100 an hour in e.g. Python programming, which you appear to do, is to stop taking gigs which pay less than $100 per hour. People express disbelief at this, and it is headdesk inducing to me.

For general Python contracting work, go to people who already employ Python programmers, demonstrate competence, and then ask if they are hiring or know anyone who is. This can be virtually or in meatspace, at meetups and whatnot.

For getting work which is more than just being an interchangeable body who can ship a web app in Python, you'll want to find businesses which have problems which are amenable to solutions with computer programs, and then sell them that you're the right person to do that. I've gone over this many times on HN -- use hn.algolia.com and search for [patio11 consulting] or [patio11 prospecting].

(n.b. You should also shutter the business which sells fully functional prototypes for $3k, because that is not sustainable. Good clients know this, so if you're using that business for lead gen, you're selecting for pathological clients. You're also proposing to do project management for projects for the worst freelancers and the worst clients, at a fee of 8% on $3k, which is an even worse idea than delivering those engagements yourself.)