Hi Wenderlynn - have you asked proprietors of similar businesses in the UK who they use? It seems like you would need the same coverage as a therapist + additional coverage for work you do offsite as a designer/installer.
Subtropical desert (Köppen: BWh)
Elevation: 1090 ft Annual rainfall: 7"
Time flies like an arrow. Fruit flies like a banana. Steve flies like a tiny ad:
Binge on 17 Seasons of Permaculture Design Monkeys!