I guess that depends on a few things:
- how poor is the fit at the current school? The worse that is, the more likely I'd be to try something like this
- do you have opportunities in your community for extracurricular enrichment of those things that would be lost (sports teams, drama classes, or whatever he'd enjoy)?
- does the new school have any position on religion in education and how does that comport with your world view and educational desires for your child?
- can you go back to the current school if this doesn't work out and how would your ds deal with that?
- do they have enough students enrolled for this to continue to be viable?