Weedwacking the Vineyard

We know that getting the weeds away from the vines is a good thing but since we don't use any herbicides, weed wacking is the poor man's alternative to keeping the growth under the vines tamed. We used to use a mechanical weeder but this year we don't want to disturb the soil and the microorganisms and have ended up weed wacking, in order to move toward a no-till vineyard.
We have been weed wacking our vineyard with a line trimmer. (Disclaimer: do not do this.) Every year, we weed wack our weeds that grow among the vines. This year, before weed wacking, we have been mowing the grass as well as the weeds as close to the vines as we can get to make our weed wacking a little easier. So far, we've done at least half of the vineyard. Here is a picture of what the vines look like before and after.

Our aspirational goal is to purchase something called a Fischer mower designed specifically for mowing between plants in an orchard. Here is what it looks like:

If my readers know of someone who wants to sell a Fischer mower cheap, please contact me!