Hi Dick,
Is this on a SLSA or ELSA RV-12?
The hose replacement isn't hard. It's more time consuming over anything else. Should take one day if you have the tools and or some experience.
You'll need carb rubber sockets, carb socket "O" rings, carb diaphragms, 66mm carb balance tube hose, Possibly fuel hose depending on what hose you have installed. 17mm coolant hose, 1 x 90 degree 17mm coolant hose, oil hoses, 1" (25mm) coolant hose. A gallon of anti-freeze, some extra oil and the ability to do an oil purge.
Fire sleeve is reusable. You'll need some band clamps like Oetiker or Fuel injection clamps. You'll need some Band-It clamps for the fire sleeve. If you must use a worm drive clamp use a Wurth raised rib clamp and not the serrated worm drive clamp like you get at Ace Hardware.
Everything is straight forward. Take one thing off at a time and put it back like you found ait and you won't have any problems.