Well, Gerad has the larger bedroom - it is his house - so the five rooms are guest bedrooms. At the moment, that's one for each active character. Gerad can add more rooms and features - but he's using Siddhisyoga to purchase such things, meaning that he has to sacrifice treasure (of some sort) to pay for what he adds. We're currently using the Pathfinder downtime rules for costs of new facilities, so adding various "rooms" is relatively quick, simple, and cheap (although adding more extradimensional space is a bit pricey) - but we'll need to find some more money (or have some downtime to generate some) first.
For a shrine, that was noted back in the main adventure thread in post 199:
Gerad Waelhlem:
"Hrm. I suppose I'm going to have to get another shrine set up too."
And he will start sketching while absently muttering about reflecting pools, transmitted moonlight, moonfire lenses, and Lucha, She-Who-Guides.
The basic shrine setup (with the base bonuses listed for the house and the shrines) costs 400 GP, I was intending to add some special functions later, but that will cost more, so it was awaiting more treasure. If it matters any, "Lucha" is one of Selune's various aliases, although it was mostly popular in Netheril, about one and a half millennia past. For good or ill, Gerad is a seer, and more than a bit unfocused in time.
Finally, I wouldn't worry too much about what background skills you have. John covers most of the alchemy, armor, and weapons crafting type skills (and makes occult gadgets), Khorolf does brewing, leatherworking, carpentry, exhibition wrestling, and various other wilderness/barbarian type skills, Raven (I think; he may opt to provide more accurate information)) crafts charms and totems and fetishes and such, and Gerad's basic tricks are 1) spirit channeling and 2) skill-based magic - so he has an awful lot of skills. Those tricks have a relatively low ceiling on raw power, but they grant access to it fairly early - which I will admit is my favorite sort of character; one with an immense array of midrange tricks which must be used cleverly.
So take whatever fits your character. We have most of the basics covered.