After some thought, maybe the easiest thing for the Devs to do is to add "instanced" small, medium and large housing to the Crystarium. They would not have yards outside the house as they are the structures on those little spires around the tower. That way they could dramatically increase housing but not have to worry about the server loads or stresses. They would use the exact small, medium and large instanced interiors already in existence, so the coding would be minimal.

As I understand, the majority of the "Server Issues" stem from the yards where people place their belongings. Allowing instanced housing would get around that and they could offer the pricing for 50% off as there is no yards. People would certainly buy them without question. They could even implement this in the main cities as they already have areas that are already "off limits" because those are for "special" people. I don't know of a single city that would not jump at the opportunity to have the WoL residing their city's special area.