Well, that is a bummer and can see why you don't want to invest in a cover - likely around $300. So given those circumstances, one suggestion would be to go ahead and get a tarp but add some reasonable weights full length across the roof and secure it as best you can. You may find that if we end up with another winter like last year, you could have to replace it part way through, which would put you in the price range of the cover. If you have time before the snow flies, etc you might take it to a couple of dealers and ask for a quote to fix the roof and tell them they can have it all winter as long as it's either indoors or covered. You may get lucky with a decent price and accomplishing getting the roof fixed for a good price. Couldn't hurt. So sorry about this mess. Hoping you can get it resolved.