You said in a previous post they were $7.50 each. 
I have had a couple of groups that used 1 towel per guest per night (Just like a hotel). This doesn’t really bother me though. I have large washing machines and worst case is I have to do an extra load. An extra load is potentially an extra hour to wait, but only a few minutes of my time, and about $1.00 in actual cost (electricity/detergent/bleach/etc.).
My towels are $3 to $4 (depending if Costco’s has them on sale) . I’ve had only one come up missing in 4+ months and I can’t be sure it’s not at my house. I’ve certainly lost a lot more to staining.
BTW, I also keep 12 extra of all of bath-towels/hand-towels/washcloths in the storage room in case I ever have a quick turnover.