Congrats sa upcoming wedding, mama! Hindi ko na-process personally pero a few of my mum friends who did legitimation say it varies depende sa lawyer at kung gaano katagal na unmarried ang parents, some paid around 15-25k lang, iba naman mas mataas, so talaga namang better to consult directly with a family lawyer para sa exact amount at timeline sa inyo. Marami ring requirements like birth cert, proof of relationship, etc., kaya mas okay kung may legal guidance from the start para smooth ang process lalo na may Canada plans na kayo. Congratulations ulit!