Just another option OP... I know this is the fiver forum but if you want to pull with a F-150 EcoBoost then there is another option that will work great and tow great. That is a F150 MaxTow/HD payload package and a nicely equipped travel trailer. Add a high end hitch like the Hensley Arrow or a Dual-Cam sway control hitch and you have a solid towing combo in all your ratings.
Fivers are nice but so are TT's, and they can be a very good combos. There are a ton more options in TT's for half tons than fivers.
If your heart is set on a fiver and a F150 it "can" be done safely you just have to properly match the truck and trailer. Something like some of the Couger X-Lite fivers.
Thanks!