If I was buying this solution and you told me you would do it for $20k, I would not consider your proposal for one more minute. I have written things like this.

If I was buying this solution and you told me you would do it for $20k, I would not consider your proposal for one more minute. I have written things like this. A decently robust solution takes a lot more than that. If you are doing a burdened rate of $100/hour, that's 200 hours, five person weeks. That's barely enough time to get a working MVP, let alone test thoroughly and deploy. Let alone implement management tools to input the orders and the screens for the workers to access and update, let alone the reporting and archiving. Let alone maintenance and support. And, if you are paying $100/hour burdened, you are hiring people for $50/hour or less. Either you are hiring newbies, in that case, who is doing the design, or you found somebody desperate and are taking advantage. Which is to say, the assertion of 1-5, $10-20k makes me mad, too, as another form of devaluing the profession of software development. Nobody is "whipping up" something like this.