Man you guys should be happy 50$ is all it costs haha, thats nothing almost the price of a bala shark here good though as saves people buying the fish who cant keep it.
Anyways a 75g as stated will be a waste, my rtc was grown in a 4x2 and 5x80x3 been 1 year and 3 months and she is 76cm thats just off pellets and not even daily !now in the 8.5x3 and already looks like its time to move her again, if these hybrids can grow faster you will be in big trouble imo as anything under 2ft wide wont last long at all.
The worst part is if you dont give the fish space i notice it just sits there hardly swims only when food is in the tank, quite boring imo with a large space swimming has become a hourly thing!
your best bet would be a tub imo, I picked up a 12,200L one for under 500$ pretty sure in the states you will be able to get something bigger for less.