op, look out for dollar per gallon salesThis is an inaccurate statement. Lots of saltwater fish have been successfully bred in captivity for years. (Clownfish being one of the most popular)
Blue tangs on the other hand, are almost always wild caught, because they are so hard to breed in captivity.
A 15g tank is big enough for a pair of clowns, but that’s it - just the clowns and then coral. Anything more than that and you risk overstocking.
I would try to get as big of tank as you can afford.
Yes, I agree with this. Try to get small ones that seem to swim together at your LFS. I was lucky enough to have mine already bonded when I bought them, but I’ve heard of other peoples clowns killing each other.
They are very social fish in my experience. Mine get along great with my goby and dottyback.
Now as mentioned above, sometimes they can be very aggressive, but it just varies from fish to fish.
you can get cheap things there in petsmart
also i feel like all the lights and sump and protein skimmer and fancy sw stuff will cost like x3 of a 15g...