I've painted 3 vehicles in my life without a spray booth, and the one that turned out the best was a BC/CC with Valspar's inexpensive clearcoat and a BASF base coat. With the single stage paint, it has to lay down smooth, be evenly sprayed, have no runs, and be shiny all in the same coat, and if any bugs and dust lands in it you have to sand it out. A base/clear system has the color in the base and the shine in the clear. Defects in the base hardly show up in the clear, and clearcoat flows out a lot better than any single stage paint I've ever used. If you get a run in the clear coat, it is either really hard to see or possible to sand out without affecting the base coat. You have more chances to correct things with a base/clear system, so I recommend that to even first time painters.
