At least 90% of painting time goes into setup, prep work, and priming. The method of prepping required varies for each type of exterior material on the home, but every project must be patched and cleaned. The more thoroughly you prep and prime your home’s exterior, the longer your paint job will last. You could save quite a bit if you do this part yourself, but it must be done correctly, or your contractor will have to go over what you missed. The prices mentioned are based on paying a contractor to do each job rather than one overall quote for the work from start to finish.
High-gloss paint is the most durable and easiest to clean of all paint sheens. It's ultra-shiny, light-reflective, and hard (think appliance-paint tough). High-glass paint has too much shine for interior walls; you'd find the reflections and drywall flaws distracting. It is a good choice for areas that sticky fingers touch, though, such as cabinets, trim, and doors.
Most of a projects price is the cost of labor at $25 to $75 per hour. However, most contractors bid out based on the entire project which includes all work hours. Hourly rates are only useful if your pro asks to do the job as “time and materials.” However, be wary of this pricing structure, it usually shows the contractor is uncertain how long the project will take.