Simplicity - S100 Sport Portable Canister Vacuum

I have the simplicity sport (which is a newer version of the same thing) and I've used it to clean offices and show homes with varying levels of success. Note that it absolutely has the suction to use it on low pile carpet with a combo brush head, but it won't drive a turbo brush very well. The other issue I ran into is that the spot on the handle where the suction control is is a weak point and I've snapped 2 vacuuming carpet and rugs.

Congrats on your new job. Handheld vacuums under $50 are pretty useless, they have weak suction, tiny bins, and an extremely short run time. They usually have no cyclonic separation so all of the dirt immediately clogs the filter. You need at least a Dyson V8 sized handheld with multiple cyclones for decent suction power and filtration but I still hesitate to recommend a cordless handheld because using it for work will wear out the battery really fast. I would choose a small corded vacuum with a hose to get into tight corners like the Hoover Commerical Portapower $159 or Simplicity S100 Sport $179. And I wouldn't use a big shop vacuum for the heavy cleaning I'd use a better quieter vacuum like the Powr-Flite Newton with Turbo Brush $175. The Newton is much quieter than a shop vac, it uses large and cheap hepa bags. I'd get the version with the Turbo Brush since it's not that much more than the standard Newton. The Turbo brush can connect to the wand or directly to the hose and it will help you clean floor mats and carpeting. It's not a wet/dry vacuum but they should buy a proper extractor if they want you to shampoo the interiors. You can save a lot by looking for a used Hoover or Simplicity vacuums too. Metro Vac makes some very compact and durable canister vacuums like the Vac 'N Blo Jr and Data Vac, I always see several used that are under $100. The best deals on cordless vacuum I could find are the Hoover Onepwr DustChaser $94, the Hoover Onepwr Hand Vac $99, maybe the Hyper Tough 1.5 gallon Wet/Dry Cordless Vacuum with battery & charger $84. What do you think?

No, but longer than you think. I had a Kirby salesman come by once, he did get some dirt behind the Simplicity canister I'd been using - but then my old Kirby got dirt behind his. Not a lot, but some.