I'll probably hardwire that since I doubt it'll support a wireless repeater bridge mode.
If you can run Ethernet cables, then it would be better to go completely wired - for security reasons alone. Sure, a wireless network can be secured, but it takes a much greater involvement by someone. Plus, you cannot hide a wireless network. Badguys will know you have computer equipment in there.
If you business deals with credit card and other personal information, full wired is the way to go, and it is cheaper too.