I too was of the belted type. However, once I had trousers made without loops but with side fasteners it all changed. If you are going to go bespoke, why not get something different from all the MTM/RTW stuff out there.
I sent Vass an email regarding cost and received the reply below.
We offer a large selection of ready-to-wear handmade shoes in our shop and also made-to-measure service. We adjust a standard last to your measurements...