Olrox17
Hero
I think such a spell would alter the balance of the game irreparably, especially since it would be available at a relatively low level.Alternative offer: Tiny Hut automatically gives you the effects of a long rest but can only be cast once per 24 hours.
Suddenly, adventure designers would have to keep in mind that optimized parties have effectively double the daily resources of unoptimized ones. It would be almost impossible to challenge a party with LTH with attrition while keeping things fair for parties without it.