Chocobo Stable Size/Functionality

Balancing the amount of pens a stable has could be difficult. In Final Fantasy VII I often found myself juggling the pens to finally make a golden chocobo. So I thought of this:

Initially when starting as a breeder your stable has 6 pens. I thought 6 would be conveniant to start with as it'd give you 4 spaces to use to house chocobos you wish to breed and 2 to house the ones you've aquired through breeding.

As you get better and want to move on to more advanced breeding you could pay a set fee to add 2 extra pens to your stable, up to a maximum of 12. This gives an ample supply of pens so that people who want to breed a variety of chocobos have plenty of room, and people who want to specialise in particular kinds of chocobos have plenty of space to house the ones they need to breed together in order to get that one exceptional chocobo.

Along with space, the stable would possess various tools that could alter the personality, stat gain or other aspects of your chocobo, such as a feeding trough that can be upgraded through crafting (used when feeding chocobos), an incubator (to hatch chocobo eggs), a hay/straw stack to replace bedding in the pens (which would alter the personality or mood of the chocobo), a heater (a warm chocobo is a happy chocobo), and possibly a music box to play music of your choice as you may spend a lot of time in the stables and may not want to keep listening to the same tune over and over again (this could also serve a comedy purpose as putting on a tune one of your chocobos likes could cause it to start dancing (wark wark! ))

Along with these usable functions the stable could possess cosmetic items too, such as a cabinet to store trophies and awards aquired through competing in chocobo-related events, as well as desks, chairs, lights, a giant moogle plushie, and other fun stuff that makes your stable look less generic and more personalised. Some usable and cosmetic items could be created through various crafts such as blacksmithing, carpentry, weaving etc. where as some special ones could also be earned as rewards for taking part in events, which would more than convince more players to take part in the events to gain the rewards and make their stable look awesome.