Yeah, I'd think your corners will be fine. But I'd definitely throw a couple of 2X4's, 4x4's, or thick pipe inside the cabinet. To brace from top to bottom. put 1 in the back and one in the front. Easily hidden too. The bottom trim I'd remove to make it flush with the floor. You should be fine with everything else. The top looks good. And the bottom boards after trim is removed will be good. Is the table and tank same size? All corners of the table even with no overhang with the tank then it should work pretty good.