Ive been doing this for a business plan as well over the past few weeks...its difficult to even say a rough idea as the products and the prices of the products very between brands.....the way I have done it is first of all put all the products you will use for one service on the table...I tried to remember and write down how many sets and rebalances and practices id done so far out of those products...this helped me to get a fair idea on how much use you might get out of one product.
Then going through each product individually..divide the estimated number of usages per each product by the price of the product to give you an idea of how much it costs for one use...do that for all your products, files etc then total it all up! Hope that makes sense...sounds a bit confusing and ill be interested to see if anyone else has a much easier way!
Its worth calculating it all properly yourself rather than relying on rough estimates from other people using different brands...I know I felt better once Id done it sounds funny but you kind of feel like you know your products even better and also makes you appreciate their value more and realise you have to be careful with them from a financial point of view....its also good to have a break down of each product so you can look at possible ways of reducing the service costs as well iykwim..my cost per service was quite a bit more than I expected.
Just to add as well that I didnt do any calculations for tools, training, time or anything like that...I just did the products I use...I wasnt sure if or how you are supposed to tie in these other costs!
