I'd rather improve upon the system on a fundamental level while keeping resources in check.

1. Instead of an outdoor porch, change the tag of "outdoor furnishing" to "indoor/outdoor furnishing". This will allow for better management of inventory, increase decoration combinations indoors, and allow gardening for those that couldn't afford a plot.

2. Add new layout presets that can be purchased for half the cost as if you had bought an equivalent plot. For example, you could buy the interior of a small (1.5m), medium (10m), large (25m) and they would naturally come with the storage increase already built in. If you relocate to another apartment, you keep the upgrades you bought. Additional layouts can be bought for the same price, and you keep them unlocked if you decide to change the interior.

3. Apartments are the base size of an FC room. With new layouts, you can make presets beyond what it already in the game, like having a small with stairs leading upwards instead of downwards, making the room twice the size as a square or twice as long as a rectangle without the stairs, keeping the combined size the same as a small. You can do similar layouts for the medium and large.

4. These changes can also be applied to the existing plots, further enhancing ward usage, which would reduce the need to swap locations unless you prefer a closer marketboard, a different outside view, or just a bigger yard.