I would have to say that it is not the best environment for him or for you and your kids.
If he even somewhat requires that individualized care, then chances are he would qualify for funding. My nephew is on the lower ("high functioning") end of the spectrum and he has had in-home aides for 2 years now. They just recently deemed that as of January he no longer needs them.
That's not to say that a child with autism cannot have a place in a home daycare. But dealing with them requires a certain set of coping skills, which you are not necessarily expected to have.
Best of luck!!