Looking back on the things I use to do traveling miles in the evenings just to give a quote to build wardrobes , I would work my nuts off for £80 upwards per day. I remember doing a few jobs for a local bed store where they wanted a load of shelves put on the walls to hang headboards on also a door blocked off and something else doing , Well I knocked the lot out in the day , we are talking Yankee days and the customer was going mental saying his staff had to work a 6 day week to get that type of money, From memory it was £150 or the like. I think a person should charge whatever they are happy with and their customers are willing to pay. There are so many cowboys in the building trade it is beyond belief. Personally I would not leave 9k worth of tool in anything french, there is a guy on u tube that does the mobile work shop superb, God I cringe at the amount of tools required not to mention the mess shooting in a few door and the furniture, I remember myself and a mate went to price up a job for an Indian account who was having an extention done and he wanted us to make 2 pairs of french doors out of 4 normal size doors and hang them fooking idiot, I decided to give up the game after lugging an 8x4 18 mm mdf sheet up 4 floors only to get the sheet caught in the stair well