"Rent seeking" has a specific definition* and it is not "I use large capital investments to generate regular payments". Buying housing with the intent of renting it is not rent seeking.
This is Wikipedia, which is as good as most other definitions: Rent-seeking is the act of growing one's existing wealth by manipulating public policy or economic conditions without creating new wealth
This is Wikipedia, which is as good as most other definitions: Rent-seeking is the act of growing one's existing wealth by manipulating public policy or economic conditions without creating new wealth