Please critique my home front-end alignment method

Not try to question you in any way. I'm just curious why knowing the number is so important. I don't see how I'd be able to achieve any more caster with the components I currently have even if I knew I was low. Although I guess it's possible to end up with more than I think I have. What would the drawback be of too much? I know steering effort increases which I'd probably welcome with the power steering. Is their any detriment to the suspension components if it caster is wrong?
I doubt you have too much BUT... the higher the caster is, the more they like to wander at slow speeds. Ever rode a long forked bike? As to the number, its like any other specification on the car. If i can know it I want to know it. Not the end of the world for sure.