Boards for high-end FPGAs like that are not cheap to make yourself either (needs like 6 layers or more, because they have SO MANY densely packed pins + you need

Boards for high-end FPGAs like that are not cheap to make yourself either (needs like 6 layers or more, because they have SO MANY densely packed pins + you need one or two layers to feed its gratuitous hunger for power), so you'll probably end up having to buy some ready-to-use solution that probably quadruples that price...