Stress isn't good for your clients and your personal relationships. I've had a similar problem, I'm quite insistent on using my own equipment, my recent client

Stress isn't good for your clients and your personal relationships. I've had a similar problem, I'm quite insistent on using my own equipment, my recent client said yes to get me move over 4hrs away from my home, then the security team said no once I setup my kit and put down a six months deposit on a flat. I insisted on new equipment or a pay raise for pay in lieu of my slower rate of experience and discomfort which effects my out of hours work. They bought me a new iMac and I'm now technical lead for a reputable sports product. I arrive at 7am and leave at 3pm but turn out 200% more than other members in the team and maintain test coverage +90%. Remember to keep a smile on your face when you discuss it with them though. They'll worry about what you know and what they don't. The first one to lose their manners is usually wrong regardless of the technical details in companies like these.