I had over 100 tiles at the top end of town with nowt but bonus as well as scattered stuff.
Shame they're not back this year but the Snowball II Snowman ( AKA Snowcat ) is 1x1 and 2% - that's 512% per land tile or 12% in the same space as a single newsvan !!
Mini nukes are 0.75% per 1x1 compared to 0.333..% for a newsvan or jet engine bike if space matters
EDIT - I had 26 tiles full of burning bushes in my B town, when they were offered for $$s, but if I scrolled anywhere near them my game lagged beyond belief - far better with 4,000 snowcats !!