There are regulations which must be adhered to when setting up a Business in BFG and permission must be sought if you are planning to run your business from your Service Families Accommodation (SFA)

Here is a handy step by step guide to help you

This is simply a guide and personnel are directed to BFG Standing Order number 5206.
You can find this document on DII on the Command Information Portal.
Someone with access to DII will need to access it for you.
If your spouse cannot help the Garrison Information Officer will try to.

Here is the application form to run a business in Germany (Annex A to SI 9.2)