I understand your statement and your concern. It is not that I have a 75 and only consider an Oscar for it. I have had aquariums since 1973. I have had all kinds of fish. And I learned from all of them and got to know them.
I have had Oscars before, and I re-homed them when they grew too large.
I have just started a new season in my life, and as I look back at all the fish I have ever kept, I have decided that my strongest desire is to raise up and Oscar and give it my undivided attention.
So, I am getting an Oscar. I am also setting up other tanks, but they are 55. i may set up some om 20s or a 65.
But I have been longing for an Oscar again for the last 5+ years.
If I am forced to re-home, so be it, but there is a strong possibility I may get a larger tank. But I could get the fish and something happen and it not survive.
Simply put, I am excited about getting an Oscar.
It has been a very long time coming and now I can do the water changes and all I need to do to care for Oscar.