Review on HIFROM Replace Humidifier Sunbeam Bionaire by Tommy Hilmy

We have a two story house in Arizona. Needless to say it is dry. I've looked at whole house humidifiers, but they're big, ugly, and not as effective in a two story house. We bought 2 Holmes portable humidifiers. Based on the readings on the devices, the filters should have been replaced within the first month. So I went online to buy filters. They are outrageously expensive. Buying them 6 at once saves (some) money, but it's still too expensive to replace them as often as needed. Looking for other options. When those filters are gone, I'll throw those 2 cars in the trash.