I won't be able to have tapered bellows due to the size of the lenses I am about to make, I will look into some different options for it, I am trying to keep everything as simple as possible.
So far the tools and equipment I have used:
10mm foam board - around £1 worth
Few small nails (panel pins) - basically free
Offcuts of pine - basically free
The expensive parts will be the macro slider (probably about twice the cost of the camera body) and the lens, but thats ok as it can be used elsewhere as well.