There is a type rating for the BE20 in Canada.
Considering the hourly cost to run a King Air 100 what you have been quoted seems reasonable. Remember all the other costs the company has, including the instructor who might like to receive something for giving you the benefit of his knowledge, skills and experience.
Flight Safety International in Toronto, ON offers Beech 1900 training but it would be cheaper to do it through Flight Training International in Denver, CO. King Air training is usually done in the aircraft by the employer. Some companies do send their employees to Flight Safety International in TX.
Insurance, safety auditors and customers have considerable time and experience requirements for pilots on these aircraft. If you do not meet these then your type rating would be a waste of money as you would be unemployable. This will give you an idea of the requirements:
AVCANADA • View topic - Contrail Requirements
Buying a type rating would get you a poor reputation in Canadian aviation that might make future employment difficult. There have been numerous threads on this and other forums about dunces and scabs who buy jobs and pay for job specific training such as a type rating. Decent and ethical employers will provide job specific training at their cost to those they choose to hire.