Have not used the X7, but it has the same features as the x5. The more advanced features start with the Graco 390.
If you could just rent a pro unit from home depot, the following model (Graco 390 ? or equal) $115 a day, you could finish in 1 day. To finish in one day you would need to be prepped before hand. All stain or paint on hand, different tips, all masking completed, all cleaning agents on hand etc. since your new at airless spraying have rollers on hand, good quality, wide and short size and decent paint brushes, masks, lastly rent the roller attachment just in case. Exterior painting and stain is much less exacting then interior rooms/doors/molding.
Rent a PRO Paint Sprayer Rental from one of our over 1,200 THD rental locations. Call your local store for same day pickup availability.
www.homedepot.com
To give you an idea of speed...Painted two story homes (2000sqft) off a ladder in one day, after all prep work. Moving the 40ft ladder alone took most of the time, and was the most work. Masking is critical work, use good masking tape (Frog), take your time. Cleanup from poor masking can be tedious. Once your done spraying and the stain/paint is dry to the touch remove the masking the same day if possible, if not possible, within a couple days. The masking comes off extremely fast the first day. Expect a long day if your doing this alone, as removing the masking, general cleaning and machine cleaning takes time. Good part is your mostly 1 story, which is safer and faster using a ladder. As to the spray gun, just like spraying a car, have your gun moving as you pull the trigger, as Zeke pointed out, 90 degrees to the surface, your hand moving as you let off the trigger. Again exterior work is more forgiving/easier.
There is no reason you could not mask and trim paint, then roll the entire building. It will just take longer. As a note once you use a good airless unit, you will not want to brush or roll a large area again.