Not every plot that become available will be taken by someone relocating because not every plot is desirable enough for people to want to pay a second time.

The number of available houses does not change when someone relocates. Relocation does not lock out buyers. The only thing that changes is which locations are available.

Considering how the last ward addition went in 5.35, SE will probably go back to using a private purchase moratorium for the Ishgard wards when they open. You're still not going to have first rights if you want a personal house.

Everyone else is also paying that monthly fee so that's a poor argument to use when it comes to getting a house.

If you're paying to play, then go play?

Your ideas do nothing to change the real problem - lack of supply. Instead of throwing out ideas that keep a poor system functioning poorly, trying supporting ideas that actually fix the problem.