Vortech FMU $178.00
FPR to get 55 psi base pressure $130.00
Gauge $25.00
Walbro Pump (required) $110.00
$433.00

Aeromotive Boost Reference FPR $155.00
Stainless Line $110.00
Miscellaneous Fittings $20.00
Gauge $25.00
$310.00

Difference in cost of Injectors, maximum $40.00

With the correct setup, and larger injectors, you can run the fuel pressure lower, and the stock pump will handle enough fuel for 500 hp at only 35 psi of pressure. It's not trying to force Niagara Falls through a soda straw at that pressure.

So, Math is > you.
Pre-conceived (and wrong) notions of cheap, versus actual research.