Theres a difference between educating and bashing. Those of you who are bashing are not helping the situation at all. Educate him politely and stop being keyboard warriors.
Bottom line, which i am sure you have gathered Carter, is that you need a much bigger tank for all of those fish. Most of them will grow over a foot long in the first year. If i were you, I would search on craigslist, marketplace, or see if any other black friday deals are going on for a 220+. This tank still will be too small for life longetivy but it will buy you some time until then. A 180 will just be a lot of work to turn around and get rid of in a year. Either that or get rid of some of the stuck to help fund a bigger tank as well. Your call.