Maybe? Its just an estimate. I wasnt thinking about labor, but for parts, motor, plus tuning you're going to be looking at around 5k atleast when its all said and done.
May i suggest searching around here, honda-tech, homemadeturbo.com, and other sites to gather information. Look on those sites for estimates on d16's, or go to hmotorsonline or torontojdm.com. It also depends on what kind of kit you want. Y ou want one that comes with almost everything or something that you're going to source parts on your own and put together? Use google to look for kits and homemadeturbo or turbod16.com on how to put one together yourself. As for labor, call some local places or look online for estimates from other shops.
It all depends on what products you use, second hand products, install yourself, etc etc...
Its hard to generalize how much things will cost but I can tell you that you wont make 300fwhp with just 3k. Definately not if you need a shop to perform the work.
To flesh out the estimate:
750 motor and trans
500 tuning
500 rods/pistons
??? sleeves
2-4k turbo kit (lower being used parts, higher being new)
1k misc parts, tools, gauges, etc
Labor? Most places run 55-75/hr and some have flat rates. Again, do some searching instead of relying solely on our words.