Shed / workshop

Hello we are a family of 3 myself my partner and his son and we are into wood lathe work and with money being tight we are looking for any kind of help to help us out to have a garden shed/workshop built as we dont have any under cover for using the Tools so with english weather we can not get any work done as we know sheds. Are not cheap and every little will help towards are shed the shed will be 12ft by 18