Based on the statement that the suction fan generates 2g of downforce, and the telemetry showing the fan operating at 4,700 kg @ ~95% load, the Tesla Roadster weighs approximately 2,300 to 2,500 kg.
Though, the thruster model that does flips has a heavy in COPV in the passenger seat, additional thrusters, and carries several hundred kg of compressed nitrogen. So it may actually weigh 2300 kg fully loaded.