mothing wrong with 175mm cranks, all the echo/zoo/etc ones are that long. might make your gear feel a little softer 'cause of the extra leverage, but it'll be all good
24" isn't rare theres just less choice for rims + tyres but the frames available look f**king awesome and all the other parts normal stock stuff is fine isn't it?
you shouldn't need new pads every week. just buy harder compouns (like koxx bloxx browns) geting a grind is a good idea, if your a bit worried about attacking your new rim just be really shallow with it.
heh we don't have a product yet (i dont think), but we made £150 in a fundraiser today (lots of people will pay money to throw stuff at the really unpopular kids).