$5000.00 will possibly, possibly, possibly get you close to the 100hp mark in a naturally aspirated outfit. It will certainly get you over the 115hp mark as a forced induction setup with cash to spare.

In NA form I reckon for every 10hp over 100hp you would need 1500 to 2000. People gradually build their motors, it makes the costs a little more acceptable but at the end of the day the costs are pretty shocking.