This episode had its share of problems with plot. Westley is broke and the idea of a mandatory teacher retreat seemed odd. Also, if Sunny can complete his chores pressing buttons, why did he claim to need the day to complete them? Still cartoons like this need not be too reliant on consistency.
The episode was very funny. I particularly liked Kim and Philly's struggle with the laundry. It amused me how Kim's remark about Sunny's wardrobe habits carried over to him mysteriously changing trunks while in the pool.
Sunny's house was a hoot and reminiscent I think of a combination of old fashioned cartoons and the Beatle's animated movie, Yellow Submarine
Finally, I must admit that Sunny in swim trunks for 1/3 of the episode would cover any multitude of possible shortcomings. ;-)