I am in the main floor too. It's very convenient having the kitchen and washroom in the main floor. I would love to have my daycare in the basement or any other part of the house where I could close the door after daycare hours. However the only way I would move to somewhere else is if I had a kitchen and washroom there.

I sounds like the option of moving to the main floor sounds better and the plus is that you will have more family space.