I am planning to upgrade from 100gl to 180 gal.
So I would like to upgrade lighting as well. But I have no idea about how .
I will get the 18" canopy.

I am planning to get this set up.

6ft 3x150 HQI Coralife aqualight pro

Question #1.

Would be cheaper to build it myself? Buying everything separate?

Question #2.

If the answer is YES, would somebody be able to teach me how?

Question #3.

Is 3x150 HQI good? Suggestions?