You will be able to work some of his teaching into the daycare in the sense of having him read to the children or tell a story on the feltboard or helping a child to play a game. All of those things will improve his own skills while also developing his leadership skills, public speaking that sort of thing.

In most cases you will have naptime in the afternoon that you can use to do some one-on-one work with him.

You might find if you advertise that you are homeschooling that you will find families with kindergarten age children that have decided not to send them to school and would appreciate the personalized instructions meaning you could provide more of the science experiments and outings.

Take a look at some of the teaching methods such as montessori. That gives a good idea of how multiple levels can learn together in the sense of work periods where each one does a set of tasks.

With lots of books and a computer in the house your son will also be able to do a lot of research type assignments with only limited input. He will become an independent learner.