Yet using full drive encryption + daily backups (or dropbox or google drive or whatever webfs) + having a spare machine at home (so that you can spare the trip to a computer store and have a machine readily configured) is necessary if you are a professional.
You seem to have underestimated this last point, with your estimation of a full day to have a new one ready.
Having a machine setup and ready can sure take hours - which might not be ok if you have a client waiting. Also, anything else may happen (car broke, computer shop closed / out of computers). I have noticed that when bad things happend, they tend to spiral out until sh*t hit the fan.
Your $1k is a lowball estimate. Better have a spare one ready and waiting for you.