There aren’t many options under $600/mo. Best value, I would be looking at Tacoma and Ridgeline, if they can meet your need. Ford Lightning programs have gotten worse, but a Lightning XLT is still under $600 for a half ton truck. Around $600, you have alot more choices, we’ve seen some good deal on Silverado turbomax loaners. The program for Silverado LT Trail Boss is decent. A basic F150 XL will also fall into this range, maybe cheaper if you can get a private offer.
Check out this thread-