David
I started 3 months ago - am using prochem steampro 2000 power max. A good work horse in my opinion. Light enough to lift out of van side door, and easy to get up stairs etc. Maintenance easy too.
You do need a van though, i bought a new cit depatch on finance deal - 2 side doors - need easy access to kit otherwise you will spend too much time digging stuff out the car.
You will find in time that you will be adding bits and pieces to your kit and space becomes a premium! My van is chocka now.
Best of luck to you.