If you've got some cheap dob with no tracking it makes sense to do it in your backyard (where the point is to look through eyepiece, not take photos), but $20 per night for everything but the actual scope at a high quality site is pretty good deal. I would expect given the other outlays to get a scope plus camera worth this site to be pretty large (e.g. at least 50k), so this is going to be a club or a school level thing, not an individual.

For comparison, pre-covid (so the cost has likely gone up quite a bit now) it was $200 a night for a 2m-class telescope and $1200 a night for a 4m-class telescope at a similar-ish site.