I would like to thank you all for your posts. I can see that there is an array of opinions on this topic. Here is my final verdict.
1) I spoke with my sister f2f h2h and she asked if she can be my wedding planner and wear what she already owns and is comfortable in, unless she (her words) losses the weight that she wants then she will buy a dress matching my color and length.
2) My bridesmaid that can afford her dress will help the other young bridesmaid pick out and pay for the dress.
3) As planned I am paying for all of their shoes, jewelry, ect.
I know we have all heard this before but...
I asked my best friends and my sister to be in my wedding, My best friend is my maid of honor, my sister is a bridesmaid, and then my other good friend is my other brides maid. All were so excited!! Then when it came down to money it changed my sister who is a size 26(hard to find cheap dresses in our colors) and has some health problems can not afford her dress I/we can not pay for it as we are payng for the wedding all buy ourselves as it is, but to ask my mentally ill sister to bow out... well it would be a large issue for her as her only being a bridesmaid was. My other bridesmaid also would not be able to afford her dress do I call off my whole wedding party and groomsmen(that can afford tuxs) because 2/3's cant afford it ?