Here is a link for entrepreneur immigration requirements.
http://www.canadavisa.com/immigration-canada-entrepreneurs.htmlYou'll need to have your properties and businesses independently appraised for value.
When you go to Canada, you will start your credit from scratch. A bank probably wouldn't give you a home loan immediately after you arrive, but if you have a successful business for a few years, you shouldn't have any problems.
Tuition rates depend on the school. Some charge higher rates for foreigners and some don't. So you should check with the school your son wants to attend to see what the residency requirements are.
Keep in mind that whatever business you choose to start must create at least 1 job for a Permanent Resident or citizen of Canada
in addition to any family members you might have working there.
Good Luck!