Fair is always difficult, and if often misjudged. An FC room is 300k, an apartment is 500k, apartments are 500k because within your purchase, you get access to a chcobo stable, market board, retainer bells, et all which you dont need to pay for like players with private rooms would have to.
Second point, getting 500k is easy. 1 full run of potd gets you 1 gelmorran potsherd you can trade in for a materia you can selll for around 300k, do Weeping Ciity as well and your done.
Third every player DOES have the right to enjoy all aspects of the game. SE arent stopping you, you have the same chance to experience it as everyone else. Its not that people should be left out, its that server space is limited, thats why there isnt space a million apartments just to make sure everyone (and thier alts) gets one.
Being ll 50 is important, unless you want people logging in, buying them all up, and selling them to you at a markup