Peter - would a grant to cover getting some expert help be of any interest? There is a grant called 'Investigating an Innovative idea' which covers 75% of the cost. It could help with getting a viable project proposal together to present to business angels or banks for example. The great thing about this grant is that it seems to be getting approved quickly!
If you're interested, I could help you review what help you need and get an application in for the grant.