I started with 75. I bought them off of Etsy (multiple patterns) and 4 years later I probably have 60 left. I’m about ready to buy another set of 25. I like to be able to get through a week before washing, though we use those white bar rags instead of paper towels in the kitchen so on a messy week we might do 2 loads. If a napkin gets really gross I rinse it and hang it over the side of the basket (well ventilated, dedicated basket) instead of tossing it in, but 99% aren’t gross.
The cost has paid for itself over time, and it’s nice to be able to stop throwing out that paper and the plastic they come wrapped in. We keep them in a nice basket on the table. I have no problem with the kids using them, it’s no messier than paper. They’re really good about not throwing them out, and it’s a perfect chore for young kids to fold them.