Zach, this are many questions to put outi n just one phrase.
I have A. macrodactylum nominate species, which I keep in my gardenhouse (frostfree in winter , but close to 0°Celsius ). the tank consists out of broken stones with openhole (bricks with isolating perforations), on top of which I install mosscovers (sphaghnum alike). They hide in those mosspolls or inbetween the holes in the stones. The tank is soaking wed and filled with 15 cm of water. In the water I keep twiglike plants (substrate for eggdposition). I have reporduced them the last 3 years. I currently have F-2 generations and some other people have even bred f-3 out of my offpsringanimals.
Food : earthworms, tubifex, slugs, fly-maggots... in fact anything that is soft and which they can overpower.
For feeding larvae I would refer to my article in the axolotl newsletter nr 28 (it's downloadable) at
http://www.indiana.edu/~axolotl/newsletter/newsltr.html.
Take the time to download it , I think/hope it is worth it