Don't assume that all renters live in flats with badly stained carpets.
How do you know which of your customers are tenants unless you ask them.
My parents, for example, live in a lovely home, full of expensive furniture and a well stocked garden - they have rented that house since the day they moved into it 45 years ago !
There is a large American community living in a well to do town near me. They all rent and their houses are owned by the companies they work for.