Just over the CT border...this past June we purchased current boat in sig (30').
Called about 8 surveyors in the area, most seem to average about 25 bucks a foot for the basic boat survey. Two or so potential ones were from over the border on your side. So your boat may be from 750 bucks to 800 bucks.
From asking a lot of people...the name that came up the most for "best of the best of the best"...Johnson, in Mystic. Adrian and Ken Johnson. We didn't get them, they were booked out quite a bit. We ended up going with Chris Nebel...he's more central CT, not sure if he crosses into RI.
Not all surveyors do engine/mechanic surveys, which can also include hooking up diagnostic computers, compression tests, etc. They usually do a basic eyeball of the engine and mechanics during the initial survey which should include a sea trial where you run the engines WOT for a while (like 10 minutes). Typically..engines with issues will reveal issues during this period. Johnsons does full engine diags.
As for the debate of "don't need engine survey, a sea trial will reveal issues"....for our boat, I leaned towards "a sea trial will reveal issues". Certainly the bigger the boat, the higher the expense...I'd think it's smarter to have a full survey done. For less expensive boats, if you're more willing to take the risk...let the sea trial be a barometer of its health.
When we had our initial survey done, at WOT...one of the engines revealed problems..backfiring. I had the yard do a compression test on the problem engine to ensure no bad valves, and later fix the issue (was ignition related..rotor/distie cap) on their dime, not mine, since I was about to become a 10,000.00 per year customer if they fixed it. Had the second engine tuned up on my wallet.