Is there a cheaper alternative to the WISE tension head? I want electric pull but I'm not doing stringing for a living so I don't want to spend $500 on a tension head. Any help?
nope. nothing worth getting. just start stringing for your friends. earn $10 each. very soon you will recover the cost.
Not only is the WISE the cheapest aftermarket electronic tension head, it's currently the only one. If you want something cheaper, you would have to build it... which I have seen done, incidentally.