I had the Philips one but after about a year it’s suction changed to the point where it’s hard for it to pick up cat litter now…
It must be able to deal with a lot of cat hair and litter… and preferably be under 500 euros.
Of course I think a corded one is better for my purposes, and I have mostly hard floors with a few small rugs.
You might be able to find a shop vac with a large enough hose and intake port, typical household vacuums will struggle to fit anything larger than a medium-sized kitten. I urge you to reconsider though; whatever the cat did wrong, there’s no way it deserves this. Show some mercy.