List of sidetracks:
1. Make penthouse (skybase, really) so Riz can live there, maybe other stuff.
2. To construct structure going up to penthouse, need marble.
3. To get marble, need fortune pick.
4. To get fortune, need xp.
5. To get xp, need skeleton farm.
I've worked my way back to 1, and now I don't actually feel like making it. Funny how often that happens, the massive projects caused by side trackings are usually the fun part.