This has been suggested before, but here's what I'm thinking about the idea.
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It would be a building on the far right side of the Garrison, either replacing or being right next to the alchemy machine.
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It would function somewhat like the guild hall building, except players wouldn't be able to go in without an invite from the owner.
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The player could customize it similarly to a guild hall - After activating edit mode (from... something), they can place or rotate furniture, install rooms, etc.
There can also be pre-built rooms like in Guild Halls, though I only thought of one so far. Rooms can also be "upgraded".
You don't have to pay any upkeep.
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The pre-built room: A special alchemy room.
It starts off with just an Alchemy Machine and a Sprite Food Machine.
Upgrades -
It can be upgraded to add a Mysterious Alchemy machine using some crowns and low-level materials.
Using more crowns, higher level materials, and special materials that can be found in purple treasure boxes, you can create special machines that create items using the rewards of secret bosses (see previous link).
These special machines can only craft low-level items at first, then can be individually upgraded to craft higher star items (using the lower star versions).
Since I only thought of one secret boss so far, I can only make one alchemy machine - The Forging Crystal.
The player could customize it similarly to a guild hall - After activating edit mode (from... something), they can place or rotate furniture, install rooms, etc.
There can also be pre-built rooms like in Guild Halls, though I only thought of one so far. Rooms can also be "upgraded".
You don't have to pay any upkeep
So basically what you're asking for is a guild hall free of upkeep?
Not that anyone would use them: people never use guildhalls so why would they use player houses?
"We're not peasants, we're knights. Soldiers, so to speak. We sleep, fight, and train together, the Guild Hall is our Barracks.
If you want a personal home, leave your guild and make a guild of your own."
~HexZyle, 78079#comment-684169, 89878#comment-796345, 91636#comment-815297, 110755#comment-1003288
http://www.clubpenguin.com/