For lactating women for breastfeeding, some areas of Sydney have high concentration of single mothers who are financially distressed and are breastfeeding.
If you don't look like a creep, you can approach them politely and strike a conversation around shopping areas and many tend to sit in the sun mid-morning around council areas.
As you build rapport, you could find a way to offer them cash in exchange of letting you suck on their tits for milk.
I'm confident some will not reject $250 per session as long as you look "normal" and not a creep -- they need to feel safe with you.