Yeah und exactly that is the problem, right? “If Requirement A, B, C, D and all the sub requirements are met, I am willing to pay x-thousands of Euros no doubt.”
For now they are not all met. What to do till they can be, if they can be met at all. And of cause if we get one of those fullfilled, the next request is just around the corner and when it is 700 Euros then, people will say “I am willing to pay that if E is met.”
And are there enough people who are willing to pay that then? We all know how this works.