Assuming we’re talking about the current V2 generation of the SmartThings hub, that’s a Z wave plus controller and your other controllers were the older zwave classic generation.
That means two good things.
First, the range of a single hop from the hub will be significantly further than with your previous controllers.
Second, zwave plus end devices other than locks can probably be paired in place even if they are more than one hop from the hub.
So even though there is no wireless option for the hub itself, you may find that a number of your wired devices can be paired in place.
For many of the older devices, including a garage controller or any light switches, you can probably use an Aeon Minimote. This is a small handheld controller. It can be used as a button remote for every day activities, and also has administrative functions which allow it to include devices to your SmartThings account. Shop around as prices vary, but you can usually find it for around $25.
So between Z wave plus and a minimote, that should take care of everything zwave except locks.
Zwave locks have to exchange a security key with the controller at the time of joining, and that usually has to be within “whisper distance” of just a few feet. So you usually do have to carry the SmartThings hub to the door lock, and the hub has to be cabled to an Ethernet connection.
If you have a Wi-Fi access point device that has an ethernet connector on it, sometimes that’s the easiest way for a very large house. Plug the access point device in near the lock, cable the hub to that, pair the lock, and then return everything to its original positions.
Just remember that if you do have to physically move either the hub or an end device after pairing, you’ll need to do a Z wave repair utility once everything is in its desired location in order to update the routing tables.