Be sure to check all your city events for free native shrub and tree giveaways!
I just wanted to pass on my experience this year.
This year, I'm trying to save money on my latest ADHD obsession of native plants. I've been getting free shrubs from the city and county. I got 2 native trees (red oak and balsam fir) and 2 native shrubs (northern bush honeysuckle and dogwood) for free this year! Lots of city and county events in my small town have had give aways.
Also, the farmers market has a few sellers carrying some native for very cheap as well.
So in conclusion make sure to check the Facebook (unfortunately the best way) for things for your city, including utilities, farmers markets, libraries, and tree/gardener programs for free giveaways!