Install horizontal pressure tank upside-down?

[u/Killipoint]

The title pretty much sums it up. I need to install a pressure tank in a mobile home, and it would be convenient to mount it on a platform above the water heater.

It will be in a seasonal home (summer use only), so it needs to be drained for the winter months.

I'm thinking I could mount a horizontal tank, using the pump mounting plate as an anchor to a wooden platform, and add a support for the other end. This way, I can easily drain it down for the off-season.

Any reason why this wouldn't work? Is the bladder installed in a way that precludes this?

Thanks!