Please do not give us a rental mount. Please give us a mount that is always with us. I'm sure a majority of the players will agree and want Chocobo breeding, gearing, and unlock quests to make the Chocobo run faster while the player is mounted on it. For example:

Stage 1: Breeding stages
Stage 2: Gearing/decoration (this will be allowed anytime after this stage)
Stage 3: Ready for mount (40% increase in speed compared to foot speed)
Stage 4: 60% increase in speed from the original foot speed
Stage 5: 80% increase in speed from the original foot speed
Stage 6: Mount Wars - Specific Scenerios/Missions/Areas (a lot of work for this to happen, including overhaul of battle system to make everything instant with no animation delays. Animation for battles should be seamless)