DID you read the link I provided about good lightning protection? http://members.cox.net/pc-usa/station/ground0.htm
IF you disconnect when not operating you would need to remove the coax FROM the building! To be safe it should be taken outdoors far from the building. Leave it lay right under the antenna.
And the radio would need to be also disconnected from your power supply. Not connected to ANYTHING.
(If you take this route, I suppose you could have some kind of coax bulkhead connector where the coax enters the building so you could just "disconnect" it outdoors, And have some kind of plug on your power supply wires, Or pull the plug out of the wall on the power supply, To make it fast and easy)
Far more work than I want to do on a daily basis.
Not to mention dangerous if you are handling that coax when a storm is in the area.
I would much rather spend the effort ONCE and have a safe system I can operate during storms