It sounds like they’re being very honest with you: you don’t need to spend anywhere near what you have budgeted. I suspect that they’ll lose credibility with their other customers if they make you a gold-plated gaming machine for four times what it should cost. They may also doubt your seriousness, if you’re approaching them with this kind of money and (apparently, at least in their eyes) so little idea of the real value that you’re asking for. In that case, they’d be understandably leery of having built the gold-plated monster and then not having a buyer, again, assuming that you wised up in the meantime and realized that you don’t need to spend so much.