I think your bib-usage sounds very reasonable, Yurtgirl! I shudder to think of the total expenditure on bibs in this household - DS used them till about 18months when he started to use a napkin instead. Both he and DD were (are) very sicky babies. In answer to your questions:
- About 30
- Anywhere between 5-15 (last week DD went through 11 by lunchtime one day!)
- About 40 (the crappy Mothercare ones weren't very absorbent so I chucked them)
- Still using for DD, she BFs and has solids, but doesn't restrict her sickiness to mealtimes - it can come up at any time!
As for the cost... I started off with plain cheapo ones, but then I realised that since she wears them all day, and they effectively cover up whatever nice outfit she has underneath, I might as well get a couple of pretty ones. So now we wear the cheapo ones whilst at home, and put a prettier one on for going out. Ridiculous, I know.