Ingwe,
Weight is a personal thing but sometimes we sell ourselves short. I ran onto a bargain bow about six months ago that pulls fifty five pounds, or I should say, is marked 55. It is a Howatt so it very well may be 58 or 59 at my draw. The first week of shooting that bow was a little uncomfortable, but boy does that arrow shoot flatter than one coming out of a 45# bow.
I have been reading a book about traditional bowyers. It was published in 1986 or so, so the bows and bowyers in the books are now classics. One of the bowyers written about was Jim Brackenbury. Jim built some great bows and had a big influence on several bowyers that are currently building bows. When I ran onto a bow built by Jim, I did not hesitate to buy it. It is marked 61# @ 28". I shot it a few times and figured it was 52-55 lbs, then took it into the shop and weighed it. 52# at 28#. It is a really nice looking and shooting bow that I would not own if I had let the 61# number scare me.
So, if I were in your position, I would consider the fact that the vast majority of the bows that you are seeking started at forty five and went up five or six pounds. If you find a fifty pounder for sale, ask the seller to weigh the bow if possible. It may be one that will work for you.