So young to have such a large cyst. Sorry for your worries. I too am in the US and have suggested either a gynecological specialist surgeon or a gynecological oncologist depending on the issue. I chose the later due to being wrongly advised I had cancer. TG I did not.
However, in hindsight I am so glad I did not choose one of the general surgeons on the referral list I was given. My friends who have been through various gynecological surgeries have had Drs. who treat and street, which when I met with 2 of the general surgeons is the attitude I felt.
The surgeon I chose was so respectful and explained in detail why he wanted additional tests, what his concerns were, etc. Upon initial exam he explained why he was 97% sure it was not cancer (whew, he was right, and that was just from my x-rays I brought with me) When the results came back he met with me again to explain them, in detail and also his surgical plan. Although the thought of surgery was scary I felt confident I had chosen the right surgeon. Having been put off by several Drs. who had ordered the x-rays, and didn't find anything wrong I felt I was in good hands. In turn with the added testing he had me prep for a possible bowel resection, which he was able to avoid. But because he was so thorough he found a complication with the artery feeding one of my kidneys which he saved. It would've been strangled completely in a matter of weeks and died! Also, whew.
In a nutshell, he got everything in a short amount of time because of his vast specific experience. I was in the hospital for a week. He checked in everyday. I was walking one day after surgery, off pain meds during the 2nd day, except to aid sleep at night. Being a tummy sleeper, sleep was hard to come by. I had a low fever the 3rd day, nurse called him at 2:30 am. He spoke with her immediately and prescribed treatment. Fever was resolved by sun up.
I had a vertical incision and was walking daily from one day post surgery. Of course slowly, but tolerable discomfort. The woman in the next bed had a vaginal hysterectomy 3 days before and said she was in so much pain she couldn't get out of bed. (She had a general surgeon)
I realize each person and surgery is different but I've been told by other Drs. my scar is a work of art. I usually don't even remember it's there unless I take an elbow from playing with the grandkids.
The Surgeon's fee was the least expensive cost of the entire thing. The surgical suite, medications, hospital stay were ridiculous! All were hospital fees and I was in a non-private room. Depending on your insurance plan and deductbles you likely only would have to satisfy your deductibles. I had employer insurance and my out of pocket was deductibles on office visits and tests. I never even saw the hospital bill.
As far as going back to Canada I guess that depends on your support system for post surgical recovery. And if it would be considered elective. My understanding is wait times in Canada can be quite long and women having pain from their cysts can suffer quite a while if they have no other complications.
I suggest a specialist for the best possibility to preserve your ovary and fertility. Your cyst is very large so that may not be possible. But you need to make clear that is your goal, if having children is in your future plans. Make your list of questions, take notes of the answers. It's so much easier to go back to them when you're calm and you don't remember the details.
All in all the post surgery discomfort was better than the problems I'd been having for years, that the Drs. dismissed and therefore, so did I. Recovery was a total of 7 weeks, one in hospital, 6 at home. I stayed with my daughter for 2 weeks but then was able to go home thereafter. Walking was the best thing I did for myself. Each day a little farther and felt a little better. The nurses laughed and waved as I did my laps cause most patients did not, so they complimented me on following Drs. orders.
So try not to stress out, it's not my idea of fun but not that bad either. Short term discomfort for long term health improvement.
Hope this helps. Keeping my fingers cross for you. Best wishes for a great Surgeon and a speedy recovery!