where you can post some building work that you need doing - ie a 10x10 room needs tiling or a whole house needs rewiring etc and then you let tradesmen or women, could be a woman, bid on the job. the person who posts it can choose the bid they wish. bit like ebay. setting up a website to that effect - where feedback could be used etc. anyone think its a decent idea, would you use it? obviously the same principle can be used for sexual services but that will be my next project.
I think you'd struggle to get anyone to give you a serious estimate on a job they didn't come out to see mate.
Are you setting one up or are you looking for one? If you are looking for one good luck! It might be better to grab a copy of this "The Housebuilder's Bible: An Insider's Guide to the Construction Jungle, 6th Edition"