Those are all beautiful quilts and quilt tops. My thoughts (being a fiber artist I appreciate the value of the quilts) is to keep the 2 bedroom condo. It is the one you already own and loved enough to want to live there. I would give the cousins the quilts that they will appreciate. I would pick out the quilts that give you happy memories of your mom. If you don't have much art on the walls then use the quilts as artwork. There are many ways to display and hang them. You can also have a cedar chest at the foot of each bed full of quilts that you can change out as the seasons change. Then you can always throw a couple over a sofa or chair. This will get a lot of the quilts out of the boxes. If there is a top you want to keep reach out to a quilt guild to find someone to finish it for you. Keeping the rest of the quilts in boxes in a spare bedroom is not going to give you joy but cause you stress. You could reach out to quilt guilds to get ideas on how to sell/donate etc. the quilts/tops you don't want. There are also auction houses that specialize in quilts.
My husband restores farm equipment as a hobby. Over the years several of his friends have passed, leaving behind large collections of farm equipment. Some of the widows are hesitant to sell at auction because the auction house takes a percentage, so now the equipment is rusting away in a shed someplace. Even if only breaks even at auction, the person who bought the equipment in the first place had the joy of owning it, fixing it up and showing it, now it can go someplace else to be enjoyed all over again and not just gathering dust/rust in the dark.