It looks to me like she is ready to drop now. I'd watch for her to start hiding and she'll start breathing fast and may look panicy, then you could put her in the net breeder with some kind of plant and a bit of gravel for the babies to hide in. I just had my third batch of platy fry in 2 months and that is the best suggestion I can give as that is what works for me. As far as grown up fry, you can find people that would take some or buy from you or call around to some LFS and see if they buy them or take them. When the fry are born, they ususally won't eat until the next day so you may want to wait 12-24 hours and offer them some crushed flake food. What I do is take a few flakes and put them in the palm of my hand and crush them using the back of my thumb nail and it makes the flakes tiny enough for them to eat. Good luck!