Definitely NOT nuts for considering picking up a colony. I have a little colony of my own. I started out with 100 nymphs and then later on bought like 10 males and 25 females to get my colony going quicker. I definitely have PLENTY of roaches to feed all my frogs. I'm not sure, though what would be a good offer. I see various groups go for various prices. However I bought my 10.25 group for $22 shipped.
As far as equipment goes - just a large sterilite or rubbermaid bin would be fine to house them in (be sure to sauter or drill holes in the sides of the tubs for ventilation), eggcrate, water gel (if you choose to use it), oranges (they seem to spark them into a breeding frenzy), and a UTH are all you basically need.