You are running a business and no doubt have costs and expenses etc.
the problem for me in justifying $1K is that you are doing what others do for the same results for about $350-$500 at most.
If someone came in with a stock R34 gtt and gave you $10K worth of bolt on parts and asked you to also tune the stock ecu, I'd understand the $1K cost.
but given that the car is stock, with stock variables, keeping stock turbo and afm, then it's the same as any other R34 with stock turbo and AFM.
The very first time it is done for the very first R34, it will take time on the dyno. getting it all right.
but the next R34 you get, why would you not start with the last good tune you did, stick it on the dyno and run it up.
check results and adjust if necessary.
why would that cost $1k (or whatever it the actual final cost is).
Like I said, you are a business with staff and coffee etc.
you have higher costs than say Toshi or CEF11E from these forums... who are members who can do remaps/burns/daughter boards etc.
CEF11E modified his own Stockish R32 GTST to the tune of 240rwkw mapping his own ecu over and over till he got it right.
cost him dyno time and his own personal time.
Then another member with an R32 GTST went and bought the same parts, and payed ceff1e $50 for that tuned chip.
made 240rwkw.
Toshi charges $350 for rechipped/mapped R33 ecu's with certain mods.
everyone that has got it has made the similar power (2 recent ones were 198.9rwkw and 199.1rwkw) in 2 different states.
both had same mods.
This particular R34 of the OP has made the same power as every other R34 using stock turbo with what is probably 10 psi with usual breathing mods.
I'm not saying you did a bad job.
I'm just trying to explain the reason why "I" think this is such an expensive "remap/chip" for what is essentially the same as all the others.