Kule, that was a figure that was tossed around TC back when that AN-2 file was going on. I have no idea what the cost would be, but it was expensive. I only recall that the airframe & also the components had to be certified by TC engineers before the a/c was eligible for a type certificate. That process was done on a cost-recovery basis; i.e., the applicant provided the engineering data & the TC engineers reviewed it all &, if they deemed it safe & satisfactory, blessed it with a type certificate.Lastly, PC. You mentioned the 100k figure. Maybe an organization of oners of sorts would lower that number for cost sharing...Or, if it is for private use, how about an experimental C of A.?..I really dont know much about this stuff so that might be way out in left field, but it certainly beats trying to convince a tribunal 180 days is 90!
I believe the AN-2's registered in Canada operate under a Special or Restricted C of A, and as such there were restrictions on the operation (SOBs & not for comm purposes), among other things.
The TC AME/Engineer types could answer your question better than I. For those with an interest, check with them.