Im running a stock greddy kit with starion intercooler and jims pipes with hks sqv bov.
i got the kit for 1,250 used from someone over on the miataturbo.net classifieds
there are always kits popping up over there and there are alot of resources available.
I never done a turbo before on any car and i did this one by myself with the help of miataturbo.net
most people tap the oil pan because u don't get any kinks in the oil return line and its pretty convinent to run it straight down.
if you buy a base greddy kit you can run 4.5-5psi (stock wastegate settings) and you can buy a mbc (manuel boost controller) later to up the boost with of course figuring out the other thigns you need.
my recommendation to you is to read this faq. Scott tells you EVERYTHING you will ever need to know about turboing you car.
http://www.miataturbo.net/forums/showthread.php?t=4288
i got my kit installed in less then a week, working on it a couple hours a day after class and waiting for some machine work to be done (i had some sheared bolts and a cracked manifold). other then the sheared bolts and cracked manifold the turbo kit went together very easily.
if you have anymore questions, i can try to answer them for you
Scott