The last company I worked for back in the UK (up till '08), added £5 "consumables" as a matter of course, as a separate item on the invoice for every job. This covered things like electrical crimps, pipe thread tape, and self tapping screws. Often we didnt actually use any extras, but that fiver always went into the pot.
I knew a fried chicken shop owner who put away a fiver for each and every machine in his kitchen, every week, to cover breakdown repair costs. I had to visit his shop at 1 am one friday night (sat morning), and he didnt even flinch at my bill.
But back to my current world
If I make stuff for other people, its enough for me to cover material costs and a few beers, as I dont charge for my time because its a hobby. If I did it would work out around 2 new pence per hour.
I use my router a lot, so have to get used to idea that now I need to buy new cutters ('m tight like that)
Luckily, there is an on island main stockist of DIMAR tools. I have bought a couple and they seem to be good quality without being stupidly priced.