I put one of the $160-200 big box units in my parents' basement .... filled up 1-2 times per day (my dad kept it emptied) during the summer. Worked fine ... I replaced it with one that (gravity) drains via a garden hose out the corner of the big basement/garage door. Haven't found anyone that can use the old one ... it works fine ... FREE
!
I might drive down to Baz's and put it on the curb
Or just go get one with a hose drain ...
Both made/make all the difference my parents's basement needed.... it's certainly not airtight either ... big uninsullated garage door, etc.