Without knowing your skill set with wood working, tools, planning building its hard to say. If you are worried about drilling holes in the glass you can order it in some cases with the holes pre-drilled so you don't have to do that. I would suggest if you consider building your own tank and are unsure of yourself then you can try building a smaller tank first as practice. I would also suggest reading the forum as there are many detailed threads about DIY builds that were successful as well as some failures that are a must read. Lots of research is important along with time and patience. I am not going to lie though you must consider that if you build an aquarium there is always a chance it can fail which is also possible with any aquarium even one purchased from an aquarium builder. The skills required to build a tank also depend on how you plan to build as there are lots of DIY options: All-glass, all-acrylic, plywood with glass or acrylic face, pond-liner tanks with glass or acrylic faces, composite bottom with glass sides, fiberglass, ect. Once you get into larger tanks like what you are planning things like humidity control and redundant power systems become very important during the design phase of your build.