What I’m hearing is you need more space than what you have working out of your home. So rent an office space that works. With this step, it makes sense to have a space where you can meet clients. Put in a TV, a surround receiver, a thermostat, a few lights, and whatever control system you sell. Keep it simple and small. It’s not a retail space, but you have some working examples to show people how a system works and how easy it is to use. Consider it this way, you need a security system, a thermostat is $150, Lutron casetta is $50 a switch, and you probably want a TV in the office any way.