I have a Berger like they now sell at HD. It is a manual level rotary laser. Can be had complete with tripod, grade rod, sensor and laser unit for less than $400. I would not rent one. They are so handy to have and you will pay as much or more to use one as often as you would like on a construction job. Be careful, they will not shut off if bumped out of level so check occasionally. Also in the winter if you have snow the melting can cause it to go out of level. Def. not high end, but works perfect for the average user. Or look on ebay for a used auto leveling one, but buyer beware!
Tim