[Robert_in_NY]

What is wrong with the 10,000's of New Holland and John Deere ground driven hay rakes that are available used?

But to answer your question, yes, it is possible to build one. But the cost for parts will most likely put you above the cost of a nice used unit. A simple rake like the New Holland 256 can easily be pulled by a compact (I pull mine with a 30 horse and it toys with it)