Just a couple of points to throw into the mix...
Steve, you mentioned if 100k was enough to set up a small operation, I would say more than enough, but dont get confused over types of AOC. You only need a 'B' AOC for pleasure flying, and that carries no CAA oversight on financial competence. Indeed I am involved with a possible start up and I have tried to persuade the principle to go initially for a B AOC due to its relative ease of application, but he wants to go the whole hog and apply for an A, and there are major differences between them I can tell you!
The requirement to fly as commander on 'pleasure flights' is 400hrs P1, so be aware as a 'bare' CPL you will need to build some hours before being able to fly on your own AOC! And yes, you only need an IMC rating, not an IR.
Hope this helps and good luck!