Your ideas are just about right on, NorthenFarmer...
You made me think of a trap that I read about in a magazine years ago, and then we tried in while in the mountains. You see, while we were camping in the mountains, we could see mice everywhere (dont know why..they have not been there like that before nor since). Here is the idea for the trap, and BOY, does it work!
I built this outside (hammered the sticks into the ground), so you could modify it easily to work on concrete:
I took two sticks, about 16 inches in length, and put them on each (opposite) side(s) of a two gallon trash can. The sticks should be about 3-4 inches taller than the trash can. Take a Coke can, and punch a nice, small hole in each end, right in the center of the can. Take a piece of bailing wire (or a hanger) and run it through the holes in the can, then tie each end of the wire to the sticks (where tops of sticks are tied together w/ the wire) Put peanut butter about an inch wide (no wider!) in a strip..center of the can, all the way around the can. Fill trash can with only about 6 inches of water (too much water and the critters can get out!).
The mice climb the stick to get to the peanut butter that they smell..walk out on the wire..step onto the can...and PRESTO, the can rotates, and they fall into the water! (make sure the can is not too high above the trash can) The nice part is that the trap has instantly re-set, and is ready to catch MORE!
When we used this in the mountains , we caught 48 mice the FIRST night we used it!! I KID YOU NOT!!
I have tried to draw a (very crude) picture...please don't poke fun, only trying to help! LOL!
Sure worked for me!