This is actually a very easy stuff to do – if you have the need for setting up wholesale prices, but exclude tax from the checkout, you can go with the following plugin (59 usd cost) – WooCommerce Wholesale Prices. You will also need to have the free version installed, along with the premium one.
Once you have installed both, it is very easy to set this up:
There are some examples to be found online that use action hooks, but they didn’t work for me or worked only sporadically, based on the location and some other parameters. But if you are having a wholesale, I am sure that you have plenty of cash to pay for premium plugins as well. 🙂