If you don't have the tools or any experience then I would recommend buying one. Building is fun like I'm doing with my big vivarium I'm in the process of building but can be very time consuming and stressful if you are inexperienced. So your probably better off buying one unless you want to customize it or custom fit it somewhere. Either way if you decide to build it and need help just snap a pic of where you are in the build and I'm sure one of us handy people will be on to help. Good luck with whatever you decide.