depends on what fish you wanted.
I had a 60 gallon for a long time. I had south american cichilds, red bellied pacus and 2 arrowannas (monkey fish).
I got into breeding cichilds, its easy in the sense you need the right temperature, and environment in the sense of rock formations/gravel depending how/where they lay eggs.
Plus the smaller/younger the fish you buy the cheaper, impatient people buy the older pet store ones that are half grown already.