Cheap router reboot - new router answer?

Hello, we have a solution that utilize a wireless router that essentially is in bridging mode, being an Accesspoint to connect wireless clients to a wired router.

We have however noticed that the wireless router sometimes cease to work properly and then a reboot is necessary. At our office the solution uses a cheap low-end D-link DIR-300, but customers with different models have also experienced similar problem, albeit they all have in common to be very cheap low-end wireless routers.

The question is whether such stability issues are known in the lower-end segment, and can be remedied by stepping up to better expansive models? What would the suggestions be?

Another idea was to schedule reboot, and Cisco  IOS routers does for instance CLI scripts that could be used for that purpose, but I would assume such wireless routers would be in a migh higher price range?

Since the routers are used in customer environments manual reboot is not a long term option.