Quote:
Each neighborhood consists of 30 houses:
16 standard houses
10 deluxe houses
4 kinship houses
Each server starts with a small number of neighborhoods. When all the houses in one neighborhood are sold, a new instance is generated and more houses become available for purchase. While this process is expansive, it is not indefinite. As a result, some servers, such as the highly populous Brandywine, have had issues with shortages of certain housing types.
Even their system is reaching its limitations and can't sustain what players want. Servers on FFXIV:ARR have been lacking since Beta and they aren't about to do a major overhaul to give you houses when they barely did it so that we could actually log in to the game in the first month.