The Ford chassis is delivered to Forest River pre wired for a brake. It should be on the underside of the steering column, and the trailer brake connector will likely be taped to a wire bundle pretty high up in the dash. Seems to be standard on any Ford based motorhome of recent vintage.
Spare tire? Unless youre planning on carrying a hefty impact gun or BIG breaker bar and a torque wrench, I wouldnt bother. I think the money is better spent on roadside assistance, but my view might be colored as someone who spent 3 hours changing two different 22.5" flats on a road trip a few weeks ago.
FWIW, Ford recommends 170 ft/lbs on the F53 chassis. Our F150 is 150 ft/lbs, and Id hate to try it with anything less than a 2ft 1/2" drive breaker bar at a minimum.