Wedding planning

So me and my boyfriend have been heavily discussing the thought of marriage and he admitted to looking at rings and I have honestly been looking at potential dresses. I'm a 325 pound girl and it's difficult to find dresses to fit me. Hell I found all my prom/winter formal dresses on a 90% off sale when Debs was going out of business! For 5 dresses it was about $200. I could really use some help here. I found these ideas and My body shape is three last pic. Any suggestions?

Idea 1

Idea 2

Idea 3

I'm kinda curvy with a lot of rolls, a big muffin top, 48DD boobs and lots of sass. Please help