Kinlin rims are certainly better priced than Mavics or Velocities. However cheaper rims can be had. Alex and Sun rims are much cheaper. Sun rims, such as the CR18 and the M13II, have great reputations, but they are shallow box rims...nothing wrong with that, but they are less aero and more traditional looking. Alex rims have a horrible reputation, but this is mostly undeserved. Alex rims often come stock on cheap bikes with poorly built wheels. The rims themselves are fine and I've built several really good wheels with Alex rims. You can find good Alex rims for less than a third of the cost of other name brand rims.

However, before you start thinking about cost-cutting, you need to conceptualize what sort of wheel you want. Do you want a traditional looking wheelset with shallow silver rims and high 3x spoke counts. Or do you want something more aero with fewer spokes. Are you aiming for a light-as-possible wheel, or perhaps your top priorities are strength and durability. Figure out first what you want to get out of the wheel, then you can start narrowing component choices and thinking about costs.