Pets & Horses Horse Storage

Here's my idea for horse storage:
You can buy an inventory extension for horses in the horse merchant for 10 emerald blocks.
You start with 5 Slots but you can upgrade it for more emeralds. The maximum amount of slots is 15.
The inventory will be accessed by pressing 'E' on your keyboard while you are riding on your horse
Also the horse will not disappear by interacting with your inventory.
Please comment and vote I will be very thankful.

 

I don't think this is possible. But you can just put your horse in your second slot right?

 

Your horse despawns when you interact with your inventory

 

you forgot a pretty important word there buddy


not to mention this is a donkey-only thing, overpowered, unnecessary, and worse than better banks