Orphanage run by Crazy Grandma

I love your idea. I have a sorta similar story. My sim avatar is a vampire priest who runs a church with an orphanage and a homeless shelter. Her actual home lot is just an empty field. She adopts toddlers and moves them into the commercial church lot. She plays the organ for "tithes". The church goers often socialize with the tots and if one sim seems to hit it off well with a particular toddler, I move the child into their household, so essentially townies could adopt them. If they were not adopted, then when they hit young adults, the tithe money would be given to them to start their own lives. Pictures in the spoiler section: