I've been eyeing this plugin for Blender called Grid Modeler for a while now. Decided to buy and try it out... I think I might have a new favourite plugin haha!
Made this little hover-tank thing within an hour or so just by drawing shapes on a grid.
Anyway yeah thought I'd share the result. This is not textured, just used material editor for it.
Download at your own leasure. Enjoy!