I am a firm believer that you can get a descent setup just from used 1g/2g parts. 14b, 450cc injectors, SMIC or Johnnyracecar FMIC, he gets free piping, $50 1g BOV(holds 18psi just fine), stock FPR, stock pump rewired, some NGK Plugs and wires, 2g GST aftermarket downpipe($100), and a custom 2.5-3" cat back.
You dont need any fancy parts. A basic turbo setup is that, basic. Nothing complicated, not any expensive fancy parts you dont need. Stock fuel pump should be good for 8-10psi, if not, grab a stock 2g fuel pump or Walbro 190 for $80, with those you dont need an AFPR.
You WILL need a boost gauge and at least an EGT gauge. If your using Megasquirt, you NEED a wideband. YOu can get the AEM 6 in 1 for under $300, but with Megasqurit and a wideband, thats all you need to tune.
Hmmm what else. Clamps/couplers can be had on eBay for cheap. Running low boost, you wont need anything expensive, but I will recommend using t-bolt clamps.
It can be done. With the right research, shopping at the right places(DSMTuners, online DSM shops, junkyards, ebay) you can get stock parts for amazingly cheap. If done right, a stock 1g/2g turbo setup will yield descent numbers. You arent going to be the fastest car our there or have the most hp, but it would definitely be a fun project and will give you a nice *umph* in power.
Dont get disgruntled, if its something you really really want to do, keep researching! You are off to a descent start. I started off not knowing how to change my own oil. WIth researching here and on other DSM forums, I have learned a lot!
Check out:
www.vfaq.com They have a lot of installs and guides, all for a 4g63t but a lot can be transferred to a 7g/8g.