Drying your car before parking it in the garage is good practice, because unless it is heated the air inside most garages is quite still and cold, which means the car stays damp for longer. Assuming you don't want to use a chamois or microfibre towel, a car dryer or blower is a quick way to dry off your car. You can use a garden leaf blower, but they don't use heated air and many do not come with air filtration, so they need to be used with care. The main issue is that most dryers are designed for smaller areas, so you may need to invest more significantly for one that can dry the whole car. We would suggest looking at blowers such as the BLO AIR-RS or Vertool Airdry, or something with real drying power consider the BigBoi BlowR PRO+.