Need help getting 4th house

[Diandre Pierce]

Jan 2022 bought my first house in the city . House hacked and in June my wife bought her house and house hacked. I started a new job which allowed me to move in with my wife and rent the first house. February of 2023 I bought my third house . And was able to rent out the second house since my wife started a new job. All three were primary residences at first until life happened. My question. How do I get a fourth house. Or is there a way to use the three houses and maybe by an apartments building or a trailer park. How do I grow from here and not do anything shady?