Okay, I've been flamed for prattling on about my surgeon too much; and it's true... I just got the surgery and I think the man is a god. 🙂 But in any case, the single biggest reason against getting an orchi is if you have NOT yet totally excluded Dr Suporn in thailand from your calculus. As you know, there are three ways for vaginoplasty: penile inversion, sigmoid colon, and basically the way dr suporn pioneered back in 2001 or something around there, the "nonpenile inversion". Which uses scrotal skin exclusively to create the neovagina to depths easily reaching seven inches. The penis is used only for labia, clit, and other surface features. Anyway, even electrolysis on the scrotum is frowned upon by suporn because of the scarring risk; he looked at my one centimeter central vasectomy scar of a decade past for a good five minutes with a frown... ultimately, he went ahead without worries, or complications thusfar.
SO, don't do orchi until you're 10000% sure you'll never choose dr suporn, because you wont get the best result from him if you do, and your scrotum shrinks over a year or two (which it will). Even the antiandrogens shrink things a lot....
Sorry to repeat myself if I did, and Good luck!