So next in line after that is suspension.... im torn on which way to go. I will def be going with coilovers and possibly diff springs/ shocks in the back since all the extra weight is making it sag a bit. If i dont do diff springs i may go with airbags in the rear..... As far as brands are concerned im torn between Icon, Kings, Fox and Boss.....
I am a firm believer in the saying "you get what you pay for". Is your truck fully loaded at all times or do you take off your RTT, etc. I think that will be a difference in what rear suspension to have.
I have airbags in my truck. They're just Meh. They're older so I have to manually fill them up all the time. The compressor broke and the bags have tiny leaks...so I have a bit of a negative biased towards them. But When I Load up my truck or Tow and pump up the bags, it definitely keeps the truck level.
If you do keep it loaded all the time I would go with an actual rear suspension system. If I had a Toyota, I'd go with Icon no doubt as I feel that is their specialty. Not many companies have awesome suspension for F150's but I believe King is the best. They have proven themselves time and time again so I would go with them. Especially since you use your truck as advertising for your company. When someone sees the blue kings underneath that usually sets the tone.
As far as springs, call Deaver Leaf Springs in Santa Ana. The do custom builds and will be able to make exactly what you want. A friend called them a month ago and there was a 2 -3 month wait time but that was for IH Scout Springs so it could be different for a ford. If not Deaver, look around for custom leafs in your area.
And , if you do go to Deaver, let me know. I work right down the street from them and would love to meet you and your rig!
Edit: Just saw you mentioned deaver in your last post....