The best answer is MA. Seriously (even if its just into Attleboro or Seekonk). The schools are far better run, overall, and MA doesn't mismanage them nearly as much (along with every other service at the state level). There's a reason that MA ranks highest and RI rank drops massively despite the proximity. The disparity also makes it to where many talented teachers flee for job openings in MA (just like everyone else who commutes out of state) because the state is just overall less combative and has a functioning pension system.

I am the first to argue that the schools here are more than fine for an average kid, but it sounds like you've identified very specific needs in your child and you're far more likely to get good policy decisions if you don't cross the border.

The one exception I will say is that there are some extremely specialized private schools for IEPs in state, but they are going to be 50k+.