plasma rife machines are your best bet by far! they are all reasonably priced. and definitely worth the price.
AND if your able to find one used go for it !
Zappers are good if you are broke and thats all you can afford.
I have a Beam Ray Rife machine that is used i am selling,
if bought immediately i will sell for $2600 its $6000+tax
search on FB rifing lyme, lyme disease rifers, lyme & rife.
Also search on FB beam ray by frequency technlogies