yes, it says new houses so i assume you have to streetpass 3 updated games. which was total beans for me when i had that initiative because it was the day the game was updated.
I got lucky with that challenge in my guest town. There were house that were Yellow which means I never checked them out. I don't need items anymore from the houses.
The one challenge that is impossible if you have a perfect town is clean up the trash in the rivers and oceans. What trash Nintendo plz? To do that I would have to remove beautiful town, throw items on the ground, water all the flowers every day, get the trash and than added beautiful back again. 3 coupons to add beautiful back again and made lose some flowers. Not happening.
The tasks should be set for your towns level not a new person town.
My Guest Town will be in June in a day. Waiting to see if the tarantula is on the list . The challenges are good for new players that still need the bugs/fish. I'm done all of those.