
SEBO
AIRBELT E3 Premium
Ultra-durable, 10-year warranty, but expensive with short cord.

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I agree with the Henry recommendation, they're very durable vacuums with strong suction, but they are surprisingly quiet. Henry 160 is the smallest canister good for homes. I think you should check out the Henry 200 and Henry 240, their bag compartment holds more and the cords are longer. I think your clients will really like his face and you can draw/add some body builder arms on his tub. Henry fits standard 1.25 inch tools so adding a good Wessel Werk hard floor brush is easy. Backpack vacuums are good for covering large areas that are not cramped or confined. I do not like backpacks if you have to bend and move stuff a lot or stop vacuuming frequently.
All of the cheaper cordless vacuums have more battery and motor problems within a year. No matter the price or brand I recommend getting a cordless vacuum with replaceable batteries and replacement parts available. It looks like the Xiaomi G20 does not have a replaceable battery so I would avoid that. If you live in the U.K. I would take advantage of the amazing prices you have on Henrys. The Henry Quick Pet is on sale for £219 and a regular corded Henry is £129. Thoughts?
Commercial grade (Numatic) Henry, easy to fix and durable,I am tempted to get the back pack version! Shark is fiddly to repair, especially when it gets clogged up, they have made it to be unfixable by the average user and require special tools to take them apart, you also need an extra set of filters, so one set can be used while the ones being cleaned and dried before next use. On the Henry, HEPA filter bag all contained, and just replace when 70-80% full (before i notice any performance drop), also the attachements can be purchased separately and standard fit with all models. Dysons don't have standard attachements with diffrent series.
Ohh I would be torn. I have a Henry for the dirty jobs like my DIY as its indistructable. I have my cordelss shark for everyday use and then a Dyson for heavy but non dirty jobs.
I've got a fullsize Henry and a Shark handheld, best of both worlds 👍
Henry refurbished on ebay £93 Had mine for years
Gave up on Dyson. Went out and bought a Henry Hoover. Old school bagged hoover, and my god the house feels clean again. It just works. I wind the cord up manually with a handle, when the bag is full it's a clean job to just swap the bag, and the suction power is so much better than a Dyson. Love it.

SEBO
AIRBELT E3 Premium
Ultra-durable, 10-year warranty, but expensive with short cord.

Numatic International
Henry Canister Series
Budget king, super durable, but heavy and poor on carpets.

SEBO
AIRBELT D4 Premium
Durable, powerful, long cord, but heavy and pricey.

SEBO
FELIX Premium
Durable, powerful, good for allergies, but heavy with awkward attachments.

Miele
Classic C1 Cat & Dog PowerLine
Durable, powerful, quiet, but very expensive, short cord.

Ranked #1
SEBO - AIRBELT E3 Premium

Ranked #1
SEBO - AIRBELT E3 Premium

Ranked #1
SEBO - AIRBELT E3 Premium

Ranked #1
SEBO - AIRBELT E3 Premium

Ranked #1
Numatic International - Henry Canister Series

Ranked #1
Dyson - V15 Detect Series