It depends on what you mean by "costs." Do you mean the direct money costs of transition only?
I haven't transitioned, per say, but if you count the costs in lost revenue from failed relationships, moving, changing jobs, etc, I'd say it cost me most of my life.
But if I could suddenly morph into either a cisfemale or cismale, I wouldn't. I love who I am.
I might not fit in with most people, or be able to maintain a successful conventional relationship, but I like my androgynous self..it's like I have the best of both worlds.
I might not be able to flirt with men, but I can out ride, out climb, out shoot (target practice only because I revere wildlife), outrun, etc. most men I know. At least the ones my age and height on the running part, LOL!
I might not know how to act like a girl, but I'm still graceful, love animals, am into protecting the environment, a great dancer who is able wear ballroom gowns that I designed and made, and I'm so pretty and petite that men I confront in an aggressive male manner don't slug me.
Depression and dysphoria are the dark side, but thankfully, I have a Thai herb, derris scandens, that helps me.