R250,000 to convert a license is insane. Its so very typical of the mindset in Africa and Europe. Its also one reason many come to the states for a U.S. License.
I helped a friend from SA with his helicopter license. He had an SA commercial.
I think the total expense he put out for exams, flight time and check ride were around $2500-3000 U.S. Biggest expense was the Bell 206
Consider also he is a great pilot with experience. Anyway he know holds an FAA Commercial.