For Future Reference.....
Unfortunately, this advice is too late for this trip, but I'll suggest it for future trips. Several years ago, we switched to a Capital One visa because we can use the points as mileage for any airline. Plus, the points can be used to reimburse us for other travel expenses we charged on the card (after it was done). So, we shop for the cheapest airfares, then get reimbursed for them with our points. We've also been reimbursed for car rentals, hotel charges........all after the fact, since they were all charged on the same card. A caveat: they won't reimburse you for a partial receipt. For example, if I had a car rental receipt for $400, but only 30,000 miles, they will not reimburse me $300. I can only get reimbursed for charges that would cost 30,000 mi. or less. (Hotel bills easily do that.)
Nonetheless, it's saved us a lot of $. True, to earn the points we have to charge a lot. DH put all our bills on Visa auto-pay (regular bills like utilities, medical, groceries, gas for the car, insurances), and we pay the bill off at the end of each month. The pts. add up quickly that way.
Plus, we've saved by using the other advice offered here. I don't mind hostels either, but DH likes a more hotel-like arrangement. So, I go for the hostels and pensions when travelling with girlfriends from college........ we never got over living out of backpacks. But DH never acquired that taste.....
Oh, here's something else that keeps me from running out of cash. I keep a little log where I record each day's expenses, then keep a running subtotal for the trip. It makes it easier to stay within the budget planned.
And, now that we're working so hard at purging for down-sizing, I will probably never buy another souvenir. I don't know where to put the brass rubbings and Impressionist prints from the post-college Europe trip, let alone other memorabilia picked up over the decades.
No more posters to frame, beer steins from the Rhine, or dirndl skirts from Austria!