SIms 4 Island Living "OFF the grid" is really confusing me!!!!

SO I didn't realize there were lots that were off the grid on the island... I went through building a REALLY cool home for the Sim/Mermaid I had just created... when I placed a light in the! kitchen, I clicked on it so I could see to build the rest of it... lo' and behold... there are no lights! That's when I realized HEY there's no electricity... and no plumbing... after googling I saw why.. haha off the grid means OFF the grid!
SO... I'm writing a chapter by chapter story/book where I use the sims for pictures. Part of the story I wanted to have my sims go on vacation... on the beach preferably with electricity and plumbing! I decided to look around the island and see if maybe there were some lots that didn't show up as "Off the grid"... there were!!! I got excited and moved my sims to one of those lots (after saving my previous home to my gallery)... I then bulldozed the lot and added the home I just built... I tested it even after I placed my sims (before bulldozing) and it still showed it wasn't off the grid... I felt safe and went with it... soon as I placed my home..it became "OFF the grid" again! Wt?? So I go to manage worlds and click on another house that wasn't off the grid... one that was placed there by EA (or whoever created the game lol)... I played the sims living in the home that wasn't off the grid for a bit...even added a tv... TV worked, no problem.. plumbing, eletc..etc... but when I decided to bulldoze THAT lot and move my home in it... it became OFF the grid yet again!!! WTH? WHY? I just want my electricity and plumbing for one family...can I not have it? LOL any suggestions???