Look at any business for the price of labour. Garages seem to be about £40 and up.

So if I takes a few hours to do the job then it will cost lots.

People don't do the jobs for free

Imagine if it was your business. Work out what you would charge for doing the work to keep the business going.

Fred in his shed won't charge the same but he won't be doing it for free

And supplying parts costs more too.