I completely agree regarding how tough things are for beginners--I'm only 9 months in, so I recall how damn confused I was when the language coming at me was greek from those trying to help.
$750 bucks is in fact a lot of money. In a way it's too bad that beginner's think they need to buy new tanks, unless you absolutely positively MUST have one exact model of tank. IF money is an object, you don't have to go anywhere NEAR 750 to get into a nice nano. Having experience with aquariums, and with access to a large city (Phoenix) and patience, I took the strategy of going used--and saved an absolute arm and a leg--with each of my tank buys. My most recent was a 24g JBJ nano with 30 pounds LR and sand, not much coral, and one fish, and all mods (surface skimmer, MJ 1200, etc...).
150 bucks. That is not a misprint.
I got even better deals on my other 2 nanos fully set with corals and fish.
Maybe I got lucky on these deals, but picking up a fully stocked nano for $300 or less is easy if you keep your eyes peeled.