The hardest part was cutting and fitting the crown moulding. Other than that it was simple. Build 2 rectangles the size of the tank out of 1x2 poplar. one became the base that sits on the tank the other is at the top. I then cut and attached 1/2 birch plywood on the two 1x2 rectangles to form the sides, back and top. The door is also 1/2 birch plywood. On the exposed edges I used this real wood edging (its this thin wood tape with glue on it and you iron it on) to hid the plywood edge. All pieces were glued together with wood glue then I used stainless steel screws from the inside to make sure it does not come apart. Since Home depot will do two cut for free I had them cut the cut the top, front and back to length (1 cut) then cut the top to width. Everything then fit into my car (camry).
Heres 2 more pictures showing the 1x2 rectangle and how canopy fits around tank.