Apartments need Rent

[Jojoya]

Point here is to add in a gil sink to the game where one isn't already existing.

That was not the point of your original post. Better go back to read it again:

So I'm trying to think of a way to make an apartment a more attractive option compared to housing, and one of the things that may help several other issues is a slight tweak to how Apartments work, specifically:

• Available once you achieve a rank of Sergeant Third Class in any GC
• Cost reduced to 100k gil
• Now has rent of 10k gil/week, but comes with four weeks of rent prepaid
• Rent is due on or before the weekly reset
• Rent can be pre-paid for up to three months
• You will be moogle mailed when you have a month (and then again when you have a week) of rent remaining
• You will be evicted from your apartment if rent is not paid by the weekly reset

Thoughts/comments/suggestions?

You never said anything in that post about intending it to be a new gil sink in that post and that is why you're now getting accused of trolling. You started backtracking and changing your story once other posters pointed out why it won't work for your stated purpose.

You're missing the key factor though - gil sinks can't be too cheap. So it makes ZERO sense to tie it into something already cheap and entrylevel. They need to target the hoarders, and they need to be VOLUNTARY - and tied to something they'll want.
[snip the rest]

Gil sinks absolutely can be cheap. Why do you think we have teleport, melding and repair fees? They're a small but steady way to keep draining some gil out of the game.

The problem is veteran player wealth has increased so much compared to the fees that they're no longer as effective as general gil sinks. SE can't just increase the fees to reflect veteran player wealth because that would leave new players at a severe disadvantage.

Gil sinks are generally intended to keep inflation in player transactions in check by removing gil from circulation. The less a player has available to spend, the less they are willing to pay for items being sold by other players and that gives the small amount of gil new players earn greater buying power.

The gil hoarders usually aren't a problem because they're not spending the gil they've hoarded. They've effectively removed that gil from circulation.

It's the players who spend their gil on player transaction as fast as they earn gil that are the problem. Those players don't tend to be as rich because they're always spending and so lesser gil sinks are needed to target them.

That's not to say that there shouldn't be some substantial gil sinks targeting the hoarders to ensure that gil never goes back into circulation but other gil sinks are still needed that are appropriate for players of other wealth levels.