I've been curious to try this but it is a fat stack of sats just to find out unless you know another crazy person nearby who will let you try it.
Walls aren't meant to be loaded horizontally, so I lsuggest a stand of some kind. I have some tensahedron stands, both DIY and bought. https://www.tensaoutdoor.com makes really nice ones that travel well.
Our kid sleeps in a hammock every night, no bed at all. He has one from Jared at https://simplylightdesigns.com/
Short answer: Do it.
Discussion
For stands, check this out: https://www.tensaoutdoor.com/make-your-own-tensahedron-stand
I have a couple of DIY stands that are made of galvanized chain link fence top rails and loops of steel cable. They're heavy, but cheap and effective. If you drill and lash them in the right spot, they'll even allow you to use an 11' tarp.
This is a great starter hammock, also. It has all the stuff you need to hang, with a stand or from trees. https://simplylightdesigns.com/collections/hammocks/products/the-starter
That might still be pricey, but it's an efficient way to get started. Having a basic hammock and stand around is always good for maximum lounging capability. The naps are EXTREME.