The 2J swap has now become plug and play like most other swaps. Wiring, mounting kits, intercooler kits etc. are all bolt in now. $15k is ridiculous for that. I had a bit more in my setup before selling but had parts supporting 800+rwhp.
if you are interested in an S14-LSX (5.3) project that's missing a few components to be turn key check out my thread. I will be back in NY in Sept for business for a few days and very motivated to sell as a complete package.
http://zilvia.net/f/showthread.php?t=610904