I am not a freelancer, so you can stop reading if you want. But I'd like to validate your burnout, which is very real.

It's also incredibly refreshing to do something totally different. I would choose wisely, though. Not really the same situation, but I went and became a naturalist guide at a nature preserve between my undergrad computer science degree and my Ph.D. Working outside not only totally refreshed me but gave me much-needed perspective. I think something similar can be said for pouring beers or delivering food.