First off, good on you for wanting to help.
Second, a 36x18x12 enclosure is fine for an adult ball python. That's the size many of us keep our BPs in, myself included.
So don't sweat that.
I personally would say now isn't a good time. You're almost definitely going to be hit with vet bills and taking care of your current animals should take priority.
I know it's heartbreaking, and we'd help them all if we could, but we can't.
You'd also have to be extremely careful and follow a strict quarantine to be sure your current snake remained healthy.
Best of luck with your decision.
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