My friend, at this point you have no choice but to spend some money here and fix your X. Trying to cut any corners, can damage your X even more down the line. Seems to me that you haven't really maintained your X or the previous owner didn't really do much to it. Meaning having kept up with preventative maintenance. Either way, yes camshaft sensor sounds like something that can make the engine shake, acceleration sensor sounds right too, since you said the X doesn't accelerate properly. Have you done water pump, thermostat, belts, hoses, new plugs, etc.... on this X yet? Maybe your coils are are going bad since you have misfire at 1,6,8.... Sounds to me that your going to have to dish some money out here and get this baby fixed. Or, it will give you more problems and maybe stop running. Good Luck