Wasn't there a story the other day about direct brain to brain communication? Maybe mind uploading to a machine is impossible, given the difference between neurons and silicon circuits, but what if you can upload your mind to another person's brain? Not surrogate wombs but surrogate bodies for those rich enough to afford this mind transplant procedure. Of course you're unlikely to enjoy the money you'll make from literally selling your body but this might make sense in a Third World setting where one family member is ready to make the ultimate sacrifice for the clan.