As to the operating remote! With the normal communications down, no remote!
Use your mobile from the car. If it is in the garage and no electricity that may be easier said than done.
Reasonable here is the problem. Hard to define, harder to quantify, and very hard to find in HOA governance.
?? and you have a license..think about what you just typed
My remote can run as long as it needs to and I am smart enough to get a car out of a garage