wow, surprised this guy didnt get flamed to death for his name alone. but anyways, yea any type of swap, let alone an RB26dett is gonna be quite costly. it's not just a matter of buying the engine and having everything be peachy. but if you want more info, i just reccomend to try using the search button...im positive that this has been covered before.
also, i think
www.240sxforums.net has some forums dedicated to the RB motors, so you might wanna check there...not too sure about content though as they dont interest me too much.
oh, and like dousan said, find the caps lock key please.