How do you add apt. rentals in your worlds without owning them?

@k1o1q2mw0be0 Confirming that only these steps are needed, and I recommend this order if you're building your own:

1. Back up your Saves folder
2. Load a lot from Manage Worlds
3. Change to Residential (not RR yet) and build your lot
4. Change to Rental Residential and assign units
5. Move Sims in

I recommend this order if you're placing an RR build from your Library or the Gallery

1. Back up your Saves folder
2. In a NEW SAVE, place the lot; this is to make sure that the build isn't one that will corrupt the lot before you put it in the save you play
3. In your own save, load a lot from Manage Worlds
4. Change to Residential Rental Residential and place the build
5. Move Sims in

To change agreements, you can switch to play the game-generated property owner in Live mode and then switch back.