No, you can't just make up words either. It's deliberately misused slang, at best. Even then, I didn't say it was or wasn't a word. Please try and keep the sophistry to a minimum. I said it wasn't a verb as "landlord" isn't a job and "landlording" isn't a doing word.
That's recruitment, not being a landlord. Recruitment is work.
Regardless of what names they may or may not have, owning something, in of itself, isn't a job.
You're making this seem a lot harder than it actually is.