I completed the code for a product enquiry form for a variable product using Ninja Forms.
A product enquiry form for a variable product needs a dynamically configurable field – CF7 cannot deliver this but Ninja Forms is flexible.
Add a cart icon, with cart count and WooCommerce cart link, to a menu.
The original product price may not be of interest to wholesale buyers so just hide it. Or change the layout of the sale and original prices.
Test for incompatible plugins by activating them one-by-one, but limit it to specific IP addresses. This allows other visitors to use the site unhindered.
Sometimes WP_DEBUG and debug.log isn’t enough to track down a problem. Then I need to debug on a local installation and use Xdebug to examine variables in the code.