Using the Ultimate Campaign Guide, I’ve worked out a handful of basic structures that PF Beginner Box characters may be interested in owning. This includes GP cost to build the structure, time to build it and the benefit of the structure. If a player wants to build something not shown here, just use whichever structure seems most appropriate for their purpose.
Note that the commercial structures assume some kind of staff to run them in the PC’s absence, and that monthly income is shown net of all expenses, including payroll for that staff. Castles don’t generate income, but are assumed to have some other means of support (such as a small tax base) which helps them break even (just to keep things simple).
Let me know if you have any questions. Cheers. PFBB Structures