"12 states prohibit state family planning funds from going to any entity that provides abortions."
https://www.guttmacher.org/state-policy/explore/state-family...
That's assuming you're correct they would try to ban private funds. A big assumption.
No, ex post facto laws aren't legal.
If the state law says so, yes, you could get an out-of-state charge for providing financial aid to an abortion operation after contributing to an organization that funds them. With Roe v Wade gone, I am not sure there is a federal precedent for how to handle crimes relating to committing a murder in one state that is not considered a murder in another state.
> No state has yet enacted a law to ban this travel. But it has been attempted: In Missouri, a bill is pending that would enforce abortion restrictions through civil lawsuits if the abortion is administered outside the state.
https://www.poynter.org/fact-checking/2022/can-states-punish...
I wonder how long it will be before SCOTUS kills off these attempts to use civil litigation to end-run the Constitution. The Texas law matched the court's ideology, so they let it stand, but now that Roe is overturned I expect the court to dispense with the law before places like California can use it to render the 2A moot.
If they let this continue, the court will become irrelevant in a hurry. They may have granted themselves sweeping authority a long while back, but that can be changed easily via legislation.
You can't prohibit private money use in a situation like this - especially not for a political funding thing. That is actually a freedom of speech issue.