The hosemaster units very very expensive in the haydays of light painting (around 1990). The original verion was quite bulky, but I've seen smaller (shoebox sized) units (sold by Calumet years ago) too.
I have used them in the past, but prefer a few simple Mag lites - much easier to handle without the anoying fiberoptics cord. Depending on the subject matter, I use anything from a little AAA unit to those 2million Candlepower searchlights sold in hardware stores.
If you shoot colour, you should think about the type of light source for the right colour effect - LED, quartz, halogen, etc... . The Hosemaster did accept coloured filters for such purpose.