So I'm not posting this because I would do this (which I wouldn't), nor do I promote anyone doing this. Because I feel that something needs to be done about the invisible lockout timers on plots, I'm going to explain how they can be abused by potentially a single person to further worsen the housing crisis in the game.
Suppose, for example, you're sitting on a ton of gil even after buying a housing plot. Maybe you want to upgrade or you don't like where your house is or maybe you just want your house elsewhere, so you transfer to another open plot. Sure, you might annoy someone who had been sitting on that plot for hours waiting on that invisible timer, but transferring a plot bypasses that timer and you get that new dream plot, putting your original plot on the timer. Then maybe that dream plot you just bought isn't all you wanted it to be for some reason or another, so you buy another, again bypassing that invisible timer and getting that plot. This now puts two plots at the start of their invisible timers.
Now suppose someone more malicious with way too much gil and even more spare time comes along. If they kept doing this for multiple plots, meaning multiple plots would be on the start of their invisible timers. So long as they have the money and spare time, that one person could effectively keep several plots on lockdown with the sole intent of barring multiple players from purchasing a housing plot unless they already own one. What makes matters worse is that while it could technically qualify as "disruptive behavior" according to the Terms of Service, there would be no real way of proving that such an individual did this since they still only holding one plot at a time to their name.
Once again, I have no intention of committing the aforementioned act, nor would I ever condone anyone committing such an act. I only point it out for the purposes of alleviating the overall issue of housing in this game.
Now how could it be fixed? My guess for the dev fix would likely be to make those invisible random timers prevent plot transfers since that would be the easiest fix (and sadly what seems to be the go-to when it comes to fixing complaints), which would only result in expanding how many players there are who are already vehemently and/or angrily opposed to the invisible random timers.
Another easy solution would be to simply remove those invisible random timers, although that would go against whatever bizarre reason there is for why those timers are there in the first place. The compromise would be some sort of indicator saying "this plot's about to be available soon", but that seems like way too much work for what is already an utterly idiotic system.
At the end of the day, I'm not quite sure devs are truly aware of how far players are willing to go to get their precious piece of land in the game. Players will wait 12 hours (which I did), 24 hours or longer just to get a house. The least devs can do is do something about the timers so that they are not a risk to the physical well-being of dedicated players who may not have a problem sacrificing it for a house or emotional well-being of players victimized by someone abusing the system.