Well, actually, I do lean toward the less expensive myself in general, but not if it excludes features that are important.
>- Using less money to get the same results
How do you know that the results are the same?
I do believe that the $10 zapper is a good value in that it does help many, but I have also heard of some that did not have good success and as a result claim that the zapper does not work. My point is that anyone coming to this forum for help with the zapper should get full disclosure.
I do not object to your initiative for the less expensive, but more to the limitation. You can get a couple of 3/4 inch by 4 inch copper pipes from many plumbers for cheap or even free ( they usually keep a lot of scrap ). You can usually find 0.032 copper 110 ( pure ) sheet ( 4 inch by 4 inch will do ) for a couple of bucks.
You might be amazed at the difference, I was. Both footpads and 1 handle are positive, while the other handle is ground.
I do not say that you have to go to a lot of expense, initiative to go further can produce some surprising results. Of course, you may not have had the parasite problems that I did.