I do believe it's possible without vacations every other month.
With a lot of IF, ANDS, OR BUTS, $50,000 per year could get you all that.......
Depending where out of the country is, there are places where the cost of living differs from where you live and you get more for your money. Also if you're able to board with someone in another country this also saves money. If you take a cruise, their relatively inexpensive since everything is included, and if you use mileage points, I suppose you can get airfare for free.
Other than that I believe you'd have to live very frugally to accomplish vacations every other month.