Hi anonymous, just in case no one on this website is in your area or able to help you out.
I'm homeless myself. I have no credit card, no bank account, no address.
I do work occasionally and sometimes, instead of cash, I ask people to buy me stuff I need.
If you got family they may be able to help you out.
It helps to build relationships with on-grid people. If not by working for them, then by other means.
Not many are willing to order MMS for homeless people. Maybe one out of 30. Keep asking. You could offer people your know-how about MMS in return.
Know that MMS is not a belief. It can be scientifically explained in a rather straight forward way. Educate yourself so that you are able to explain to on-grid people that may be in need of MMS themselves. Trade favors..
Anything infection related may not respond very well to MMS if one's diet is based on cheap supermarket "food". Heavily processed, sugary and carbohydrate rich foods can cancel out MMS -I learned the hard way myself.
Wish you and any other off-grid'ers good luck!