Not uncommon to offer varied levels of precision; appropriate to the end user. We often have to lift their standards, usually when they think 'anything will do'. The usual job shop calls the shot maybe half the time.
Making tooling or repairs for knowledgeable customers is far easier; they understand overhead and costs involved.
It's the guy walking in, "it's just threads", a bearing fit, a crummy casting to duplicate, that's shocked by cost.
Well; go buy yourself a lathe, tooling, only stuff to make THIS project. . . then a building, electrician, riggers, business license, property tax.
Allow time to learn how to do "just threads. . ."