I live where there is an abundance of Aspen wood available, but rarely use it for anything other than wood ceilings. It's a very soft wood, is notorious for end checking and splitting, and is very difficult to get an even finish on. As an example, the last ceiling I did, required 4 coats of sanding sealer, before the any lacquer could be applied. The reason is because of the "fuzzy" areas that occur when the board is being planned, these areas just drink in the finish. Same problem with staining... the wood blotches badly. Aspen wood is rather weak too, as in poor structural strength.
FWIW, I'd build out of birch or Soft Maple......Jim@Jlazy3