Yeah, though, as stated, most any "big" base is going to have a Maintenance Facility for the unit stationed there.
Maybe not on some agriculture farming world that hires a single mech lance, but if your on garrison duty on the same world as an RCT then its likely a big base.
Any world that sports a factory of any stripe probably also has some mech bays near by even if its not actually a mech factory.
Not every world will have one, but, "big ones" likely would.
Anything that sports a "Fort Whatever" location that dates back centuries to the SLDF era.
The Wayland & others don't really give you anything that a Recovery Vehicle & a Leopard doesn't give you, and in a lot of ways its less.
It travels w/ your support caravan but also is tied to that slow rate & can't actually reposition quickly w/o DS support anyway.
A unit w/o DS support & garrisoning some backwater world would want one but anyone in the core of the IS or any regional HQ area with any size to their unit would probably be fine w/o having a "Repair Bay on Treads".
Because I'm curious, I'm looking at a map of the Kathil PDZ. 8 Worlds, and purely from memory w/o reading up on any of them, I'd be willing to bet that 5 of them have a decent chance of sporting a Maintenance Facility on them just from recognizing their names as Factory, Training Base, Regional HQ, Etc etc worlds.
That seems like a lot, but, I figure at least 1-2 in any PDZ/Operations Area can lay claim to one so units can do some annual maintenance cycles.
Beten Kaitos
Emerson
Talcott
Smolensk
Kathil
Monongahela
Salem
Novaya Zemlya
Anyway, I just had to take a look and see how many in a specific area I recognized.