Good post Ian.
When i started, i had experience, but i was starting from scratch with equipment. I found that even now, after a year, im still buying things. Just buy the essentials, as above, but be prepared to be spending money on specialist/extra things as the jobs come up. A good set of tripple ladders is always good to have too, and ive found a single smaller ladder is handy to have on the roof racks.
All in all, just be prepared to spend your budget on setting up, then spending more money on things you didnt think you needed but because of a certain job you get, all of a sudden you need something specific.