Re: Dado blade set on the cheap?
There are a few decent dado blades on Ebay with a few of them likely to sell well under $30. They are available as stack dado or wobble dado, carbide tooth or steel tooth. I've had my Craftsman kromedge dado set about 40 years and still use it to cut frames. I am seriously debating replacing it because it is not quite as sharp as I would like. I sharpened the chippers a few days ago, but the blades would be much more time consuming.
Verify your arbor size and decide whether 6", 7", or 8" dado is appropriate. I often use 6 inch blades on my 10 inch table saw because they make smoother cuts on frame parts, but I don't have a 6 inch dado to say whether it would be a good choice.
DarJones - NW Alabama, 46 years, 24 colonies, sideliner, treatment free since 2005, 14 frame square Dadant broodnest