Never used a blower, I've always used a good quality drying towel. Lay the towel over the panel and pat dry, don't drag it. You'd be amazed how mush water they soak up. After patting dry a spritz with a quick detailer and all your water spots will have gone. As you build up the layers of wax (and top up with quick detailer) you'll find it easier and easier to clean and dry. Mine is at the stage now where I can dry the car with an open hose, the water just sheets off.
Seems a lot to me. I had my previous Merc C Class estate fully corrected and protected by a well known detailing company not far from me for less than half that. You could buy yourself a DA polisher, some pads and polish and do it yourself. It's very satisfying. However, with the soft lexus paint you need the finishing pads and a gentle polish only, then a good protective layer.
The advice above about claying is sound. 2 or 3 times a year my process is snowfoam, rinse, fallout remover, clay, rinse, panel wipe, polish, wax. Every couple of weeks it's a wash and quick detailer top up. Wheels are protected with EZ's Wheel Armour although Poorboys do a wheel paste which works well. GTechniq products for the windows, Aerospace303 for the interior and Dodo Juice leather products for the upholstery.
Not the best pictures but the attached shows what you can do with velvet black.