When cutting through drywall from the interior of a room use a utility knife and cut carefully you don t want to drill through a hidden wire or the paper.
Cable drop through attic multistories.
3 8 is really only useful for a single cable run and i can t imagine running cable through a 1 4 hole.
Yes this should be corrected and it would be good to have the wiring and all the circuit connections inspected as well.
If you will need to fish wiring through a wall drill a hole through the wood plate in the attic only.
I ve never run much coax but if are a 3 4 in hole might be a better.
If drilling downward through the floor repeat the above procedure but expect to pass through 3 4 inch 1 9 cm sub floor and up to an additional 3 4 inch 1 9 cm of finish floor hardwood etc once 2 inches 5 1 cm have been penetrated it should be much easier to drill.
The attic wiring should be protected and secured to ceiling joists or other wood structural supports.
Tape the end of the fish tape tightly onto the cable with electrical tape.
How to install an attic fan video.
Use a piece of string that you can add a small weight to such as a steel nut or whatever you can find.
This video shows how to install an attic fan to help keep your home cooler.
And use semi rigid wiring fish tape to pull your wiring down to your outlet location.
Then retract the fish tape to pull the cable through.
Pull the cable through with a fish tape.