At the launch of Heavensward, 300,000 gil represented the entire savings for many adventurers. However, 3.0 was much more generous with gil, and everyone's fortunes quickly increased. Simply selling an unused gear reward from the story could earn 50k. As an example, during the recent the Moonfire Faire I realized I could craft the turn-in for the faire voucher. I have not capped any crafting job at all, but I made 40,000 gil selling 20 dishes in just a few days (and I potentially could have made more).
On the topic of housing, when individual player housing was first allowed, most servers did not sell out at all. The first reason was lower population and few features unique to the housing system. The most important reason was the pricing. "Insane housing costs" was the joke back then, not scarcity. At that time, the S house was the most rare and desired property due to its price, and I remember when I would occasionally check the price of an abandoned large estate hoping I could buy it someday. It steadily decreased in value for nearly a week before being claimed.
These days, hardcore raid-tier FCs will spend as much as 50 million gil or more on preparing for world progression. BiS crafters can make 1 million in a day.
This massive inflation of adventurers' gil holdings means that many more players and FCs are able to afford housing plots at the initial purchase price.
There are many proposed solutions to addressing players' desire for housing, such as more wards or real-time instances. I am not saying those options shouldn't be considered, but with the current system, an adjustment to have the initial purchase price be extremely high would have solved many issues.
Suggestion:
Initial pricing of 40M, 120M and 400M for small, medium and large estates (for example)
Instead of intial pricing of approx 4M / 20M / 40M
During a regular sale process, this price would decrease slowly every hour until reaching 4/20/40
During initial release, price drops would happen faster, with price drops every 10 minutes and price halving every hour.
This would better equalize the distribution of housing, not only by determining which players could get a plot, but create fairer outcomes by reducing multiple purchases as well. This would also change the scenario from players being unable to get an estate purely due to bad luck or technical issues, to a situation in players' control.
There are FCs who are offering rewards of 130 million, even 200 million for large plots, and I feel that FCs which have legitimate obtained so much money should have first pick of their estate. A high initial price, such as 200M, would give that FC a home without the intervention of "house flippers".
Imagine that in the suggested reverse-auction system, the FC would have calculated that they could buy the 30/60 plot they wanted at the "60 minute mark". At 50 minutes, 8 wards are sold out of the plots they want, and someone arrives at the placard they're standing at. But they have enough time - and there's enough supply - for them to run over and check on another ward. At 60 minutes, they get Plot 30 for 192,000,000 gil. Within 2 hours, the very last L plot sells for 120,000,000.
There's no chance for flippers to buy any cheaper than someone is willing to pay - aka, no arbitrage.
The initial accelerated drop schedule and 10 minute interval gives players barely enough time between price changes to find alternate plots, fix FC permissions and transfer money. It has enough intervals to make the price drop gradual, and if you set prices to drop to 4/20/40 within 3 hours, this would allocates all estates within 2-3 hours: giving them to devoted players who planned to login immediately at launch, and it lets most NA players get to work on time.
In the case of a relocation or abandonment sale, the price drop would be slower and halve every 3 days or so. This maximizes sale price and increases the opportunity for a very rich homeless FC to notice the sale and raise funds, rather than handing it off for cheap to someone who was online at a specific hour.
Some people will argue that high prices will mean only the richest will get housing, and that bans will solve "house flippers". But some would say, whether the plot is used legitimately or resold, that a large plot going to a lucky small FC (or a flipper) for a lower price 50M, rather than going to someone who values it more, is an "unearned windfall" and an "inefficient allocation of capital".