Thanks for the input. To clarify a little, mainly this is an idea for raspberries and grapes. I have an Ison muscadine vine right beside a row of Josephine raspberries. I just tipped the raspberries and noticed I need to weedeat under the grape vine. If I layed landscape fabric/mulch under grape vine and planted raspberries under them then maybe that would eliminate the need for two separate trellises and also provide some shade for the floricane raspberry crop. Also, this would eliminate the need to spray herbicide or weedeat under the grapevine. I can’t pencil out the cost for tunnels over raspberries with the yields we get on the east coast. Tipping the raspberry plants on the May, June, and July full moons would help keep plants lower and more productive. The floricane crop should be finished by mid/late June in my area. Hoping this will work since Grapes/Raspberries have similar growing requirements with the soil PH and nutrients. I’ll try and post a pic later this week to show the two rows growing beside each other.
Also, to clarify I am referring to grapevines grown on a one wire trellis. The vines are pruned back to 2-3 buds in the winter.