Maintenance on the drivetrain and " vehicle" portion of the MH will be the same type of items as a car just more costly depending on whether it's a gasser or diesel pusher.
Maint on the "home" portion will be things like keeping the roof penetrations sealed and any items that may wear out. Kind of depends how old it is.
Will you be traveling regularly with it?
As said above if you're not putting on a lot of miles and camped in one place for extended periods then it may be better to get a TT or a 5ver and a tow rig instead. Eliminates the need for another vehicle and maint and repairs are now mostly on a common pickup truck.