How many holes can a masonry drill bit make?
I can't give an exhaustive scientific answer, but I have plenty of hammerdrilling experience, both with SDS bits and smooth shank bits. I have a Bosch Bulldog and seeing that you'll be drilling for hours into concrete, would strongly encourage you to be using this or some other SDS handling tool:





It depends on the diameter of your bit and how deep each hole is - I have drilled hundreds of holes with my half inch SDS bit without any sign of weakening (though moderate wear on the tip is apparent). But whether SDS or smooth shank, a 3/16" bit such as is used for drilling for 1/4" masonry lags can be expected to drill, oh, my best guess is maybe 200 3-inch holes before becoming significantly dull (breaking is almost always user error). This is assuming concrete without foreign objects.

Perhaps due to your remote location, you are stuck with a non-SDS battery hammerdrill. Those Irwin bits should work okay in that case, just at least twice as slow as the SDS system (which is why I would really encourage you to get your hands on the SDS drill).

In the final analysis, I would calculate one bit per hundred holes if you're using 3/16" bits. You will probably break some.