1. Upgrades get queued as soon as I get materials for them. Priorities are rooms>crafting>wood>others.
2. Quest points, by day 5 I have all guilds at around 140, except fighters which was at 230.
And continuing the save, On day 5 I sent my PC and one of the 2 tanky slaves to farm a grove for magic wood, so I can do some slave upgrading if I need it, and if i'm lucky catch a fairy too.
I kept my Valk with daisy and another slave I picked up running dens while the other party traveled to the Grove, and by the time they got there I had finished 2 dens and had 2 more slaves to train with (both with average magic/wits so it's a good start for magic users), the extra heals are always helpful, and I don't have heavy armor on yet.
It's my preference to not farm the resources at the end of the dungeons this early, since you can buy them from the shop, and you can get a good chunk of stone/obsidian after demolishing a couple of shrines. I simply forget the dungeon once I unlock the chest and cast a social skill on the new slave if I'm to keep it.
On the matter of items, I'll use every weapon or armor I can, and if I can't use it, save it for disassembly later. That is arguably the most valuable thing you can get out of the guilds, since we're doing 2 parties already and running dungeons all day long. And you can get it this early, with only 100 guild points. This is how you get the rarest materials super early.
So I got to the end of day 6 with 9 slaves. 2 tanks, 6 magic users and Daisy.