Haha, as long as your budget allows, there is no "too much Disney". Seriously... I think finances and paying debt is important. But, I also am a firm believer in the important of family vacations - because THEY are what your children will remember. They aren't going to give two whits about when the Visa was paid off, the nice car you drove or the day your mortgage was paid. But they WILL remember the time you spent with them on vacation. So, as long as you are able to responsibly take care of your debt and still afford to go - then do it!
We went assuming our trip was oging to be one and done. Partly because my husband was NOT keen on Disney and partly due to finances, we didn't think we'd ever be able to afford another trip. However, since then, things have changed. We certainly won't be yearly visitors, lol, the budget didn't change that much! But, we're hoping to be able to return summer 2017, which will have been 2 years in between. My hope is then to return again in 2021 for their anniversary celebration, as well as SWL and TSL.