for the most part yes , but that don't mean you need to go out and break the bank either
for someone who is just starting to get into the hobby a 30
gal would be a good choice to start with
you can get by with the basics
a good
hob filter
skimmer
heater
2 450 power heads
and a decent light
a sump would be nice but not a necessity to start out
remember you can grow into a bigger tank over time learn the basics first