I have one in my garage, it's run constantly. I have had one with a 10l water container and it would need emptying every day.
I get dehumifiers off ebay, not paid more than a couple of quid so far,
I think the present one has been in use 5 years or so and cost 99p;-)
But it's the wrong time of year to be getting them from ebay for 99p.
I killed lot's of them as without a defrost they freeze below something like 12ºC and the pumps burn out, the ones with defrost are ok down to 5ºC, They don't bun out instantly so breaking the ice off/ getting it off with a heat gun once a day often keeps them going.
What do the desiccant ones do about drying the desiccant?