To the original post, I agree that you are pretty much fully stocked. If anything, I would add another neon or 2 but that would be it.
i have had a 1 betta, 4 platies, 4 guppies, 4 swordtails, 4 mollies, a sucker fish and 2 cories once in a 11 gallon. the rule of 1 inch for a fish for ME didn't really apply as these fish were quite small. they were all very happy and i didn't find them stressed at all. just make sure u have some plants and stuff. a 10 inch fish in a 10 gallon would be quite bad, but 10 1 inch fishes in a 10 gallon is obvious not as bad.
there are people on here who may give u advice from a book or from personal experience. take it, but be aware if they could afford to buy a 60 gallon for 1 neon tetra then they may very well do. crazy people
I would have to disagree with everything you said except the part about the 10" fish in a 10 gallon tank. First off, regardles of who you are, the fish you say you had in a 11 gallon tank was too many unless you had absolutely massive filtration and a super maintenance schedule. With 16 live bearers, you would have a new batch of fry about every 2 days provided they weren't all males. You also didn't say how long you had them in there or any other particulars. I have had 20 fish in a 5 gallon tank before but it was for only a couple hours while I cleaned their regular tank. Obviously, I had no problems.
1" of fish per gallon of water isn't a rule, it's simply a guide mainly for beginners to help the ease into the hobby. If they follow it, they will have a much better chance to get their tan up and running with a minimum of effort and hopefully no lose of fish. Obviously, it can be exceeded depending on the filtration and maintenance schedule but that isn't a good idea for someone setting up their first tank.
Secondly, no one on here would buy a 60 gallon tank for 1 neon. The people on here are extremely knowledgable and have years of experience. I don't know how old you are or how much experince you have but the advice given on this sight is second to none. People here have no reason to give bad advice. We are all here because we share a common fondness for our aquariums and fish and want to help others get started in the hobby and enjoy it as well.