1. As long as you have the proper admission to the USA, and do not forfeit your Canadian status during your absence, yes.2. If your qualifications are otherwise sufficient, you can apply for permanent resident status at this time.
3. If you intend to apply for immigration on the basis of the intended business, then you would be required to provide a business plan. As a skilled worker, this would not apply.
4. The duration of an employment authorization authorization application is dependent, greatly, on the requirement of validation of the job offer. A review of the job offer (even if it is a job offer from a company that you have previously established) would be required to make this assessment.
5. If you will be resident in the USA for a sufficient duration, or can return for an interview, it can be done therein.
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Campbell,Cohen - attorneys at law
info@canadavisa.com
tel: (514)937-9445; fax: (514)937-2618
http://www.canadavisa.com