Mind you it is 17 feet long by 10 feet wide and it's only just big enough to meet my needs. It is fully weather tight, well supplied with electrical points, well lit and well insulated, heated, ventilated, both natural and fan assisted, partially carpeted, and has a phone, ethernet and digital TV ariel. It has a security system as well as 10 double glazed windows complete with venetian blinds. More importantly it has two 6 foot by 4 foot tables with the options of making up to a 10 foot by 6 foot or a 12 foot by 6 foot table using some add-on boards.
It also has enough built in storage space to keep most but not all of my collections. I also have a painting table, room to keep all of my paints, sprays, brushes and glues as well as a computer hooked up to a large screen which is also a TV and DVD player. The only thing the hut does not do for me is make a cup of tea in between moves or allow me to meet the resulting calls of nature. Fortunately the house is at the other end of the garden.
Don't ask me what it cost.
OK I'll tell you anyway. Somewhere in excess of £6k but the only other choice I had was to move house. In Edinburgh the difference in cost between a typical 3 bedroom house and a 4 bedroom house is around £100k so I reckon I made the most cost effective choice.