Yes ... That's enough, though I would put in a extra 5 kilo's of live rock latter on. My LFS has a 40 gallon display tank that has about
45-50 kilo's and a protein skimmer. No live sand (bare bottom) ! And it looks great. It's not hook up to his store system either.
He says just don't over feed the fish, no matter how hungry they look at you.
Also later get a PhosBan Reactor + a very small power head, and run carbon in it. Or get a Aquaclear 70 power filter and just run carbon in it.
I personal took my power filter off my aquarium a few days ago. Soon I'm taking my Wet/Dry (Eheim 2227) off too. I have 32 kilo's in
my 60 gallon.