Fire starter
It depends. I shoot for 15 - 17 dollar per frag range which factors in shipping. Sometimes I will splurge and pay around 40 if I want to support the business. I do not have any boutique corals in my tank so it isn't expensive for me. However, i will say that when you look at the tank as a whole it isn't uncommon to spend as much as a kitchen remodel. You need to know this going in because we are talking about water. Saltwater. And if done incorrectly or with short cuts - the wrong ones - it can cause serious damage to both living quarters and personal.
Prices in other hobbies are no different. Scuba diving - check. HPDE? Have to be able to walk away from the car and in my case that was 55k. I've seen others walking from North of 150k and as low as 10k (older miata). Just depends on what you want to do and how practical you are.
If you are upset because you are not able to, or choose not to, play in the boutique space. Don't be. Plenty others to choose from. To put this into perspective one night after a really good filet dinner I looked back at the table and saw the wine bottle. I chuckled and said to my better half - well, there goes my Gem Tang...
One last thing. There are really some good people in this hobby that share frags. It can be a self sustaining hobby between hobbyists because we cut, trim, and rehome. Clubs, meet and greets, all work. If you are not as outgoing say or a bit more recluse (as my wife calls me) then no, you probably won't see as much. But it happens.
We have all been there. Two in college. Tank upgrade. I wanted to use TBS rock. I couldn't make it work so I went with dry pukani. Worst decision I made with the tank but here I am two years later and saying while I don't like it - it worked in the end.
Enjoy the hobby. It is what you make of it. Best of luck to you.