Trying to figure out how much it is going to cost to put in some concrete is not the easiest thing in the world. You have to calculate the volume of the space and adjust to make sure you don’t short it. Then there is the finishing. If you just have it float finished it is going to be much cheaper than if it is a stamp. Of course, contractor concrete prices are going to be much more expensive than if you do it yourself. Don’t fool yourself, concrete finishing takes skill and if you want it to look good when you are done, you really should consider hiring a professional.