I'm looking for some product recommendations. I'm going to be installing 5-8 WAPs in a building, and this time I'd like to look into using a wireless access point controller to manage all the devices. Does anyone have a good recommendation for a controller and the WAPs to go with them?

I've only done a small amount of research so far, but all I'm seeing are controllers that are going for around $4K. Is that what I should expect? Are there cheaper alternatives? I just know that the client most likely will not be interested in spending that much...