I'd recommend starting with the resources under 'Running a practice' on the ICB website.
My PI insurance is under £70/year with Qdos, and that is with other staff members for a few hours a week.
AML is all covered within ICB website.
A lot of CPD is time commitment, rather than expense. HMRC webinars are free, for example. Attending branch meetings is not expensive, for example, and counts towards CPD, as well as being good for networking and support.
Then try to make sure you set your hourly rate at a level which will not only pay well for your 5 hours a week, but will cover these additional time and expense commitments.
[To get to 'start new topic' on the Forum, you need to be in one of the specific sections rather than the latest topic section. That might solve it.]
Hope that helps!