Budget? $1,500 total for all or just the PC?
What is actually included in "all peripherals"?
First step is to determine the hardware requirements for the software that you intend to use.
Most applications present some hardware requirements (specs) grouped as minimal, recommended, and best.
You do not want minimal and you do want as much "best" as you can afford.
Holds true for peripherals as well.
Start with an "ideal" setup/configuration that fully meets all applicable requirements for performance. May or may not be within your budget.
Then scale back where viable with respect to any available/acceptable trade-offs.