I started reaching out to seamstresses just to get a general feel for cost. The only person who could give me a quote over the phone quoted me more than my dress cost in the first place (granted, my dress was only $500, but still).
Because my dress has multiple tulle layers, I was quoted $350 just to hem it. Then another $175 to change straps and add cups. So not HORRIBLE, I just wanted to see if anyone else was faced with this issue. Photo of dress for reference.