Pdocs and Ts have training for mental health.

Teachers have training to teach.

Being in some school setting would be beneficial in the long run. You're his mom, not a professional teacher. Children always act more defiant with their parents. And what kid wants to do work? Especially as it is all online - such easy access to thousands of distractions.

Being in a school with a professional would allow him a break from being with his family and house all day long, it would allow him to interact with peers and develop social skills, there would be qualified people around to actually assist and teach him. There is set routine in schools and while it might be what you aim for at home, if your own mental health gets in the way that will affect the routine of daily life.

There are just so many more benefits to allowing him to attend a real school.

If nothing else, use your spare money on a tutor instead of other things.