The prices for accommodation in Ružomberok are extremely economical, most visitors from all over Europe make a point of it. Of course, there are expensive hotels here, for which you will pay from 150 EUR per room. But in general the cost of accommodation in Ružomberok ranges from 30 to 50 EUR for a good room, even in three-star hotels. And there are inexpensive guest houses for 20-25 EUR per day per person. You'll get a good breakfast and it's easy to get to the ski slopes.
So when you choose cheap accommodation in Ružomberok, you are not limiting yourself in almost anything. The only thing to keep in mind is that if you're calculating how much it costs to stay in Ružomberok, keep in mind that prices rise in high season.
You'll also want to travel around the area, visiting museums, spa villages, springs and other attractions. It's all worth including in your spending budget. But in general, you can have a week's vacation in Slovakia for about 500-700 EUR.