Always good to get new ideas. I use a SCUBA tank and an old reg to fill my SIB and top off with a foot pump (to get the right pressure)
I have a petrol leafblower (a totally useless gift) in the shed. It might, with a Nasher inspired attachment, be persuaded to do the same job even more quickly. I'd be fitting a filter mesh in the airflow somewhere - there's stuff you wouldn't want in your tubes. The obvious attraction being that I have one, it's light and compact and it would be a talking point at the beach.
I could probably dry the boat off with it too