Freelancer turned founder. Should I fire my clients or start an agency?

I'm 20 years old, and fortunate enough to have parents who let me skip college and live with them while I teach myself to code and run a business. That said I am tired of being a drain on someone else's resources and want to become self sufficient as soon as possible. Long term I want to move beyond selling my time and actually own a business.

I've been freelancing for the past three years as a full-stack developer.(React, Express.js, CouchDB, etc.). More recently I have completed several embedded projects where I wrote code in Rust and Javascript to run on fleets of Raspberry Pis. I also manage a couple of Linux servers. I currently charge $30 to $40 per hour and have no shortage of work.

Currently I am also working on a product that helps farmers save water by monitoring soil moisture and only irrigating when needed. This is taking most of my time, so I only have a few hours a week available for freelancing. This ends up being very frustrating for my existing freelancing clients who love the work I do but want me to do more ambitious and time-consuming projects for them.

I am considering hiring freelancers and gradually transitioning my current workload over to them. Basically take some time from my irrigation project to start an agency, with the hope that it will give me more time in the long run. I have mixed feelings about this idea. On one hand I would hate to see all the trust I have built with my clients over the years go to waste. But I am afraid that the freelancers I hire will not be able to deliver high enough quality and I will just lose a bunch of money paying them and then doing the work myself anyway.

Any suggestions or alternative options which I may be missing would be appreciated. Thanks!