You can design both a circuit board and a case with Fusion360, which is free for personal use. Use JLCPCB to assemble the board for you. You can 3D print the ca

You can design both a circuit board and a case with Fusion360, which is free for personal use. Use JLCPCB to assemble the board for you. You can 3D print the case yourself. It took me about 20hr to learn how to use Fusion360 and make a simple circuit and case this way.