Section concerning bees
A bee is an animal. The description of bee is "A hairy bee buzzes around.". The bee is undescribed. Understand "bees" as bee.
A bug hotel is a home. The description of the bug hotel is "A bunch of boards with big holes. [if occupied] Several of the holes are occupied by mason bees.". The printed name of the bug hotel is "[if occupied]bee hotel[else]empty bug hotel". Understand "boards" and "holes" and "bee hotel" as the bug hotel.
Instead of transforming the half-eaten boards:
if infested:
say "They are full of wrigglies.";
otherwise:
say "You put the boards together and prepared them for hanging up. They would make a nice bug hotel.";
now the half-eaten boards are nowhere;
now the player carries the bug hotel.
After inserting the bug hotel into the tree:
now the bug hotel is suitable;
say "You hang the bug hotel on the tree.".
Instead of taking the bug hotel when the bug hotel is in the tree:
say "The hotel looks fine where it is.".
Every turn when the bug hotel is suitable for the third turn and the bug hotel is empty:
say "A mason bee flies out from a hole in the bug hotel and heads to the meadow. You notice several other holes are also occupied.";
now the bee is in the location;
acquire bee;
now the bug hotel is occupied.