Despite the replies and people supporting them on rejection of my idea, I would love to see anybody coming up with other feasible suggestions which would help with the dissatisfied player base looking for housing with the current constraints?

1. Server stress
2. Server cost
3. Game design

something more reasonable, like making the house and its exterior an instance like private quarters and apartments, so there can be a lot more per ward.
I imagine this to be somewhat similar to EA's solution from The Sims 2 to The Sims 4, where the bigger community map and play area was segmentised to a smaller local play area, which others cannot view until they enter your housing instance. This is also similar to the condominiums/apartments already in the game. Pros are it will help lessen server stress and more people can own an apartment, cons are it becomes less fun/beautiful and less likely for community to foster around the housing area.

You pay a box cost + sub fee + retainer fees, and you want to add ANOTHER sub fee on there??? For real??? How about NO.
Hard pass.
Of course, everybody wants everything for free. The game gives each player 2 free retainers, makes it so that players can pay for additional retainers if they require them, but there will always be those who cry out and demand everybody gets those for free as well, because "it isn't fair, we deserve to get it, we're paying monthly sub." I'm not complaining, I like free stuff too. If it works I'd be happy too.

Adding additional server capability is not all that expensive, all things considered. Main problem with adding more housing wards is actually a poorly designed software system rather than hardware restrictions anyhow.
So... what's stopping the devs from adding 50 more wards in each city in every server? No design has changed, just a lot of copy pasting the same code on additional server space then linking them to aetheryte.