I've never encountered a cartridge bearing hub that I could not service with common hand tools, but that includes an assortment of sockets (used as the press anvils and receiver cups) and a big bench vise. The "special" Suntour tool is nice, but not required and you can fabricate something like it for yourself, it's a pretty simple piece...or use a blind puller end from a slide hammer. As noted above: if the bearing just needs grease you can service it in place and save a lot of effort and possible grief and a small bit of cash: I'm sure I replaced a lot of bearings I could have just re-greased in place if I'd been a little less zealous.