Do you know anyone you really trust, who is maintaining their ancestry sub, who would be willing to "adopt" - i.e., incorporate or import your entire tree into theirs? If that's possible, and you can do it, you could "reclaim" it at some future date, I feel sure?
Is there a printer-friendly way you could chop it up into sections and then print them out to re-assemble?
Otherwise, perhaps it's time before it expires to get a very large piece of paper for each tree and start copying it out by hand.