I picked up this broken off tree branch on my run last week and put by the side of the road to pick up after work. I grabbed an empty planter from the garage and stuck the limb in dirt anchored by rocks. I bought the crows last year for $1.50 each and tore off a section of spider web to string on the frail branches.
I think black bats up/across/down a wall looks good in any Halloween decor. If you are trying to make a statement and you don't want to spend much, grab a few black poster boards and start cutting out bats. I didn't use a template for the bats, just traced two versions on the black poster board with a pencil and cut through 3 layers.
I'll show a couple of versions here- smaller kid spooky and bigger kid spooky. The mummy wreath is a little more mild with the googly eyes and tones it down a bit. The mummy wreath, bats & tree were made for less than $10.
Here's a closer view of those lit up pumpkins. We'll carve the rest of the pumpkins closer to Halloween.