I don't have a basement. I live in Florida where we have slab houses.
If I drill as I described above, I would use a 1/2 inch bulkhead / PVC pipe with a screen to prevent the possibility of clogging. Run it down the back of my tank to the floor. Then up to the drain under the sink. This way there would be about 4' of drop from the tank to the drain.
Good plan?
Sounds like a good plan and I agree 100% that drilling the tank is a much safer and less risky route to take.
Now that we are in our new house I get to redo my drip system again and make it better