Here's a thread where this was discussed at length.
viewtopic.php?t=8460&highlight=acidfree+boards
Here's another thread:
about7489.html
I use bags for most everything except the things I use every week, like rule books. I use boards with my bags for only my more valuable items.
There are bags of all sizes, and I even use really large bags for boxed sets. I store everything is acid-free magazine boxes. I store the boxes in a place where the temperature and humidity is relatively constant.

Truth is worth finding and life is too short to work for money.