Due to ground obstacles in the vincinity of the takeoff, it may not be possible to acquire sufficient GPS sat. As long as you have good vision positioning or you can handle the ATTI mode with confidence, its perfectly OK to launch under such condition. However. Its essential to take the craft to a height where a good GPS fix can be acquired and set the home point manually before flying away.
As for the gimbal/camera repair, I suggest, if the price is right for you, get a new camera and assembly. I've tried the ribbon repair before twice, but the camera never operated trouble free on a consistent basis. Crashing hard is liable to cause other camera issue besides the ribbon. The ribbon replacement is not too bad. You need a magnifying glass and a steady hand (and tools) to get the job done right. Youtube is your friendly advisor.