kind of off topic, but just like "budget builds" from the magazines. "How to build a strict budget 360 for 5k"....
I guess budget is individually based. Even 30 years ago, they advertised budget builds of 3k. This is at a time when my induction system was a 20 dollar TQ/cast intake from the junk yard from a maxi van. Heads would be home ported by me. Used cam and lifters a part of it. Headers were 99 dollar cyclone or hedmans.
I guess budget covers a broad spectrum.