Does any one know if any of these mods are available any where?
If you can hold on for about a day and check back then, I will have a solution for most or all the points you listed.
---Door locked except for family. I'm going to check out an old simlogical door and if it works it will solve this.
---OFB's Electrono Ticket machine will charge a set hourly fee to use the lot.
---if the sim/family has a car and uses it to visit the lot, it wouldn't be possible to have it park in a driveway, but the car would park out on the street and stay there.
---disable mailbox. wouldn't be necessary, it would be a community lot. Using the mods you mentioned, sleep and shower on community lot, the sim/family technically would be just visiting and not actually living there.
---I'm in the process of writing a mini guide that will explain how seasons/weather works when visiting a community lot and it will also explain how to set weather almost permanently for a community lot. (Using Simwardrobes Seasons and Weather controller).
I think that covers all the points you had