There are not many options for streaming local broadcast channels. Some stations offer their own feed (but not many). But there are some, and I believe you can stay well below $100 with most if not all of them. Here's what I can find with a quick search (not in any particular order)
Hulu Plus Live TV $76.99-89.99 85+ channels 30 day free trial
Sling TV $40-60 from 30-130+ channels 3 day free trial
fuboTV $74.99-94.99 220+ channels 7 day free trial
Paramount Plus $5.99 only the local CBS station 7 day free trial
YouTube TV $72.99 100+ channels 7 day free trial
Sling TV might be the most cost-effective choice. However, I just dug deeper and found this caveat:
FOX, NBC and ABC are available for some Blue subscribers in select cities.
So, not all locals are available there. Hulu with Live TV is $76.99, and has the most generous free trial period. The higher monthly price is to remove ads (except for Live TV).