Depending a bit on where you park.. Fairly common.. But you may need to chat with the park manager.
The park where I am.. IF I were to take a lease on the site this is the site I'd want. About oh, 20 yards away (Well within Wi-Fi Range) is a power pole (Electric pole) with all the needed wires hooked to it.. I could put a small cabinet (Rubbermaid) at the base of it, Snag a feed (The park power distribution panel... One of 'em, is right there and I seriously suspect the manager would install an outlet for me if I bought the parts) and set up my own Wi-Fi..
In fact.. If I ever take a lease. I plan to do that.
Then I need to make a decision.. Do I let the others "Share" my link or not.
Currently I let selected folks share my router (Which is a park repeater) however those who tick me off (including my next door neighbor) not so much.
One advantage of my router.. I also give you a local URL (192.168.y.z) with sub page.. you connect to it and you find some Video recordings.. A few movies, and the TF shows I currently have recorded... You can watch my recordings on YOUR computer using only a browser and Media Player. NO SPECIAL programs/applications needed.