For all the people with large number of chips, the most feasible option would be a double density board with 20 Chips at about 100eur.
Even larger boards would pose problems that I don't want to face, doing such a time-constrained project.
+1 on this. I will order more chips if you are able to do so.
Edit: I already ordered more. I believe you will make a 20 chips board anyway
