I think this should have been implemented long time ago. I don't understand why Square Enix have not allowed the player's alts to also have access to the personal housing plot if they own one.

The plots are already limited, and I own a plot. But I don't feel like buying another plot for each alts one by one. It's a lot of money and a lot of time wasted. Alts should be allowed to share the usage of main's plot in the same server to repair, garden, manage chocobos and also teleport.

If anything the alts and people who share the house should get rooms. But my main focus of suggestion is allowing alts to use the house.