What are all the “passive” income solutions you could use on a newly acquired house these days?

I am planning to open a share-house but it would be great to have extra revenue in addition to the collected rents.

On top of my mind,

– Vending machines for drinks
– Luup scooters
– Advertising board
– Car park
– Coin laundry

Anything else?

I do understand that location will be the most important parameter though.

by franckJPLF