How much would it cost to have consultations and support from an independant business advisory service in UK?

If you are in the UK can get free advice from Business Gateway. anything from the business plan, financial, tax, marketing etc.. There are testimonials from people who have received help and have achieved success.
www.bgateway.co.uk.......also try trading relationship

Workplaces are also business advisors, again free and disseminate. Workplace also offers a grant to launch by the criteria