Your consultant is wrong. Your consultant is either lying to make money or isn't smart enough to understand basic Canadian immigration rules. Either way, fire your consultant.
You need to move back to Canada before you will be able to sponsor your spouse for PR.
A PR could stay outside for more than six months BUT he/she will need to meet the RO (2 years within the rolling 5 years period)
Some provinces may have 6 months rules for the health insurance coverage. But that has nothig to do with RO.
Agree with the rest, PR needs to be living in Canada to submit family sponsorship application. Fire the consultant.