Yep, if they have to split the bill 10 ways each paying 10% the probability of that agreement happening and resulting is some very low number. If they are small seasonal lots it would be hard just to get them on the phone. Then not all will need the water right now. You would already know if that was the case.
I would guess, could be small lot cuts for lake seasonal cottages, 50 x 50 or 50 x 100, cut to sell for a few thousand in the old days. Would never happen today because of (you know, code, zoning, wetlands, Health Dept.).
So possible scenario. idk if the Health Dept would grandfather the raw lake source water for drinking. They may allow repairs but I doubt you could do your own new.
The repair scenario could be out the window because of the impossibility of getting 10 people to agree on anything. That's if they do not live there and need the water today.
So drilling your own potable well comes into view. But there are clearances from well to well and well to septic. So it becomes a race to drill first before your neighbor does and blocks you by no clearance for another well.
Fast forward to the future (this happens much faster now, the future comes faster). You drill and have water your neigh or does not and then no longer can. He either has no water or pays for a tap on yours. The lots with no water and no future water go from $50k to $5k or less and you buy them cheap at the fire sale price (divorce court price more likely). You have water and double your lot sizes over time cheaply.
Screw the town and live there year round, build what you want and make it nice for yourself. As long as you have water you can live there.
Drill first and ask questions later.