The car blower thing is on my radar at the moment - I've been thinking about it for a while. ****** frustrating detailing and drying your car with towels, only to have to chase the drips from all the little nooks and crannies and then come back the next day to still find water spots

.
I will go down the route of a 'proper' car dryer (with air filter, don't want it to be a sand blaster(!!), and heater to chuck out warm air 20-ish degrees above ambient temp). The leaf-blower/pet hair-dryer option might be cheaper, but fancy something designed for 'porpoise'.
I've been holding out for a decent cordless option (or waiting for corded versions to have a half-decent cord length). But getting bored of waiting for manufacturers to catch-up with what I want to be honest. Flex have a cordless option, but super pricey to buy into their battery and charging system if you don't already have one of their cordless DA's (which I'd love, but can't justify the out-lay right now), and it doesn't seem to have an air filter. So options for me seem to be the hand-held corded BigBoi BlowR (£99 - but with a pitifully short cable) or the Blo-Air S (£95- cable still shorter than I'd like, but better for me than the BigBoi - oo-err missus, that just sounds...not what I was trying to say

).
Leaning towards the Blo-Air S - not to dry the full car, just to blast dry the wheels and chase the drips out of the annoying trim bits...
BLO AIR-S Hand-Held Car Dryer The BLO AIR-S is a compact yet powerful hand-held car dryer perfect for motorbikes, bikes and smaller areas on cars such as wheels, grilles, engine bays, mirrors and much more. The AIR-S is small, but mighty, boasting the highest power output of any hand-held car dry
www.cleanyourcar.co.uk