Seems like the difficult part will be cost effectively shipping the finished pieces and getting them to the destination without damage.

It's common for me to work with local cabinet makers to design pieces that fit racks like the Middle Atlantic SRSR and CFR series as well as proper ventilation.

A lot of times a cabinetmaker is already associated with the job so they can easily make matching pieces.

For smaller jobs that aren't new construction or remodel it's still easy enough to bring in a local custom cabinet/furniture guy to get the job done so for me it seems easier to go to someone local for this type of work.

Unless you can build pieces for substantially less than a local shop I'm not sure what the benefit would be?