Hopefully this post will help someone in my situation
I've been travelling every other day between Seattle and South Surrey for past few months and making sure every day counts. Working on H1B in states and PR in Canada. Definitely there is significant cost involved with the travel back and forth (I own a house in Seattle and rent one in South Surrey). Wife works in Seattle and lives there so that's other hard part. I haven't sponsored her PR yet and she does have Visitors visa to travel Canada. I wanted to try this out myself and see if I can work it out to qualify for citizenship. I understand there will be scrutiny but will deal with it during Citizenship. It seems like people have done this in past so don't see an issue as long as maintaining the residency obligation and contributing to Canadian economy.
So far apart from travel being hectic crossing over border and staying away from wife for part of week rest seems fine . I do have nexus so that definitely is helping with border traffic.
I've been filing taxes on both sides and maintaining travel records I-94, saving receipts on daily purchases for ex: cup of coffee a day so just in case I-94 isn't updated for some reason and I get to have some alternate proof. Still long way to qualify for citizenship and hopefully one day......