This book contains sketch pads, scaling grids and costings sheets which takes the guesswork out of whether or not it is a profitable project. Many "idea's" seem cut & dried and must make a profit but if the figures do not stack up you could be spending time & money on a failure before you start. This book quickly analyses the cost and hidden costs which you then have to compare to your expected Selling Price to give a profit or a possible loss.
The book contains ample space for 20 projects which should last several years and at a cost equivalent to less than a £ per project it could be your best idea to buy it.
Always happy to accept feedback or input on how the booklet can be improved.
Good Luck on your Projects and wishing you all the best.