Would you please tell us your machine? Someone here will probably know or know the resource to look it up.
For me, my vintage machine was a 1940s era (and I'm circa 1960) so was older than me. I never really looked for a walking foot because I had gotten good enough for me.
With my modern machine with a huge throat space I'm able to do a lot more than the 5-7" typical in older machines. Unfortunately for me, my good machine needs to go into the shop and so I'm using one of my backups, a very lightweight brother that I would never try quilting anything on without being in a table.