I'm planning to paint the exetrior of my house to get it ready for
sale. The old paint is in decent shape, with not much peeling, so the
main function of the pressure washing will be to clean the surface, not
strip the old paint. In fact, I'll mainly be repainting the faded trim
and only touching up the walls.

I was planning to rent a 2,400 psi washer from Home Depot, but am also
considering buying a low-end consumer washer for $70-100. For example,
there's one on sale at Sears with 1,500 psi (not sure about the GPM
rating).

Would something like this be sufficient for my needs, or should I rent
the heavy duty one?

Thanks.