I own a condo building in NYC and had a similar situation, but I was loathe to drill holes in the building's basement floor due to numerous pipes and unknown items underneath a ~100 year old foundation, so I opted to simply not drill into the floor.
I got a three very large sheets of 3/4 plywood, put one on the floor.
Framed it with 2X4s
Framed it internally with 2X4s at 8 inches and then put in a lot of pieces going at 90 degrees using metal connectors you see in hurricane areas for rafters.
Filled the voids with pea gravel for weight.
Attached the second piece of plywood to the top.
Attached the third to the top of that plywood.
All in was $400, including delivery of the supplies, which I suspect is about double the cost of a good set of carbide drill bits, but less than the cost of bits plus a good drill.
I did this 10 years ago and have had zero problems.