When we moved a couple years ago we moved to West Greenwich for the school system. We actually looked at some comparable houses in Coventry, but at the time, the real estate + fire tax would have been like, 4-5K more a year than the house we ended up in WG. West Greenwich has a homestead tax discount, and I believe it's a 30% discount or something.
As far as Coventry goes, I have friends and family that went through the school system and haven't heard anything really negative.

Hm, I never have, but I'll be honest I haven't been down there for a couple years now so idk if things have changed or not

I think it technically closes at sunset, but I've never had any issues down there while doing astrophotography. I think as long as you're being responsible you won't have any issues.

Ninigret Park in Charlestown, Frosty Drew Observatory is there.

I can't comment on how much they cost to install as mine was already installed when we bought the house (2400 sqft). However, I think it will probably vary depending on brand of stove and how you need to have it installed (direct vent, vertical pipe, etc).
As far as pellets themselves, you can get a single pallet delivered I'd say averaging about $350 a pallet, 40x 50lb bags. The cost will vary depending on brand and where you get them from.
My stove burns roughly a bag every 24 hours, maybe more on really cold days. I had 2 pallets delivered by a local nursery for a little over $800, so in theory I should be good for the season.

More details on this? Isn't it recommended to have a liner? Honestly just curious, the last time I had my chimney swept they were pushing that I have a liner installed.