I just wanted to post an update. I booked a ticket for SMF-IAH-PHL-IAH-SMF on Sept 22 for 269.60 all in. That's around 4.6 cpm but doesn't require an overnight stay and I am able to do soon.

Thank you again to Palal and JayhawkCO for your help. I didn't do as well as your suggestions but I am happy with the price.