Consultation appointment for alterations

So I go tomorrow at 2pm for a consultation appointment for my wedding dress alterations. I haven't seen my dress since March. I can't wait to put it back on with all the accessories but dreading the amount of cost. Plus I'm scared that something may go wrong. I need the straps and sides taken in, cups sewn in, hem taken up, and a bristle. The bridal boutique I bought the dress from quoted me 700-900 because of multiple layers and fabric. My FH sweet Aunt offered to pay half of alterations as a bridal shower gift and my mom gave me 300.00 to use toward the dress. Fingers crossed it doesn't cost that much. Here is the pictures before.