BEGi does have the option to have no AFPR and it will deduct $100 from the total.

I bet you could just buy the regulator and sell it here or on ebay for more profit. You might make 150 or more :)

I'm running the BEG-S, non-intercooled at 5psi with stock injectors and a Brain built MS.

At 5PSI, the stock injectors do provide adequate fuel, barely. You don't need the AFPR.

I wouldn't run without a WB02. Another cheap upgrade that is worthwhile is the MAF delete.
Good luck, and if you have questions as you start tearing into this, give a shout.