I don't see why a bodysuit is out of the question. There's nothing wrong with a little modesty.
You can consider investing in an airbrush makeup kit, which would help for many future costumes, but that will be pricey. Especially to get a compressor. However, that will help you get a nice, even, and quick coat. And it will help get some nice gradients going for the shading details.
I still say there's nothing wrong with a bodysuit, though. Easier to reuse, as well.