You are RIGHT diYum - I think the expression is 'as quiet as a church mouse'!!
I plead guilty as charged.

Your post was made some two weeks ago & it was not until Thursday that I became aware of it. Mi Culpa - my e-mail notification system did not cut in & I wasn't checking in here every day BECAUSE it is so quiet. You may notice that as the moderator here, I have given many a response & many have then just backed off & not replied to the help offered.
I will offer the following mitigating circumstances though - you have been receiving help & advice from other forums that I am part of & now that you have read Quisqueya, you might have alternative questions you would like to raise here. PLEASE go ahead & I'll do my nest to be more punctual in replying!!
WHERE to live depends greatly upon your needs. There are excellent International (I presume you mean by that 'of good quality & English speaking?) schools on the South Coast as it is where most of the rich live - school fees can be expensive as a result. Punta Cana area is very 'NEW' & doesn't have the infrastructure of Santo Domingo, Santiago or even Puerto Plata yet, but that is something that will be coming within the next 5 years I suspect.
Santo Domingo has culture, history, schools, CHOICES.
Santiago has a little less in cultural options but still has some. Schools are good, traffic is less (but STILL heavy to my mind), it is close to the north coast AND 2 hours from Santo Domingo. It is also close to the mountainous areas of Jarabacoa.
The North Coast has Gringo's, virtually no cultural options (no theatres, few cinemas & few museums that are not 'TOURISTY') but traffic is generally more acceptable. There is also less stress &/or people chasing around to 'get things done' ....... I don't mean 'Today' get things done, I mean 'EVER' get things done!!!

!! VERY laid back - almost horizontal in fact!
Your 'Disability' will be what YOU make of it here. People are extremely helpful & will help where it is requested & most times even if it is NOT requested. Dominicans see a need to help ....... & are 99% of the time first to get in there to help! Easy to get around on the pavements with a wheelchair?? Not many places fall into that bracket. Santo Domingo has better pavements but a LOT more people on them; Santiago & Puerto Plata have SOME nice pedestrian areas but many pavements (sidewalks) are pot holed from the rain storms & not yet repaired ..... from about two Governments ago!!.
Racism (not mentioned here I know but it DID become an issue for you on other forums) is NOT the issue you envisage it to be ONCE YOU BECOME INTEGRATED WITH THE LOCALS). Once they realise you are of Gringo extraction, once they realise you are just trying to 'get on with your life' & involve yourself in the community, they will see just another guy. One of my friends felt his colour was causing some negative feedback ....... it took me a long while to explain it was HIS attitude to his colour that was causing the negativity - how HE responded to the locals was what was causing their negativity. Strangely, this guy is STILL a friend!!
Okay, there's a bit of feedback for you to mull over. Come back if you want/need more. ~ Grahame.