How can I get a liquid deviance? I don't have enough money to buy one and things to exchange. There must be some scheme that I can use.

There is a scheme for a device called a deviance extractor in the state store right now. Once crafted, you use it to obtain liquid deviance from a deviant pet. However, the pet is no longer deviant afterwards.

If you have no deviant pets, the only way is to buy or trade for it.