Instead of using a container to mix a small amount of epoxy, just make a mixing surface on your workbench using painters tape. Simply lay down strips, overlapping the edges so the epoxy doesn’t get on your bench. When you’re done, peel off the tape and throw it away. This mixing surface will work for more than just epoxy, you can use it for wood glue or any other material you need easy access to while working on a project.
My shop ended up being 23 x 19 feet, for a total of 437 square feet. I put my wood rack in the basement, but outside the walled in shop area. To keep the dust in the shop, a three part strategy was employed. I have a dust collection system, an air filtration system and a shop vacuum for cleaning dust out of machinery. I put up new walls, installed new electrical service, lighting, and two access doors for ease of materials movement. The shop includes two windows so that I can enjoy natural light, and not feel like I am squirreled away in the basement.
Let’s be clear about one thing: No workshop is perfect for everyone. If there were, I could simply give you a precise plan to follow with clear dimensions. Every person who comes to the hobby, avocation, or profession of woodworking has his own particular collection of tools and his own peculiar work style, skills, and desires for the kind of woodworking he wants to do that gives him a unique approach as to how he will lay out a shop: where the tools should go, where lumber and supplies are stored, and how much bench area he needs.