I have to agree here.
There is no way you will be keeping a good, healthy, pleasant tank with 6 fish at 29gals.
I had a 60 gallon that had 7 fish in it and they are all small fish that are mature at about 3 inches. I recently upgraded them all to a 150 and have only added 2 more fish. I still have a little bit of fighting and such.
You will end up wasting your money but more important is that health and well being of the fish. They will be unhappy and as a result will die/fight/jump. Your tank parameters will be all over the place and instead of having a great hobby to enjoy, you will end up with a mess of a tank that you will never be happy with unless you except what is possible and what is not.
I will say there are those who push the envelope and those who succeed in doing so. Those who succeed are the minority. Those who succeed are generally very well versed in the hobby and have a lot of experience.
If you want to enjoy this hobby for a long time and grow as an aquarist, *accept help, go slow, and learn from other's mistakes. It will save you so much time and energy. Honestly.
Happy reefing!
*Thanks Dude. It was clearly past my bedtime when I wrote this up