For Rent Negative thread

I m finding the new pack a bit frustrating to be honest. I created a house that my sim was turning into apartments whilst living on the lot. It cost most of his money to furnish out two nice but basic apartments. Then, I wanted him to move out and rent in the new world for a bit whilst receiving rent for the apartments he owns. The problem with this is, he was receiving very little income from the apartment he was renting out yet it had cost a lot of money to furnish them. But, to rent out an apartment as a tenant he needed a lot of money for the furniture so I opted for no furniture. When I started to place my own furniture in the rented apartment I got a notice saying the rent would increase. I m finding this a bit frustrating, it’s not working the way I thought.
I have nt watched many videos about the pack though, no time, so some of these problems might be down to my lack of understanding. Hopefully it will get better.