I don't think you're mad at all. I think your reasons are logical and sensible! I can't influence your decision as such, but it does make sense from what you're saying. There's no denying that the 50-500 plus body AND tripod etc is a pretty weighty arrangement. I sometimes wonder why I endeavor to lug all of the gear around, but at the end of the day it does actually keep me relatively fit! It's your decision, and I say go for it- I don't know much about the camera you propose to get if you do go ahead, but the bridge cameras are getting better and better. All up to you chum- keep us posted.
Oh, and a big warm welcome to WAB too
Nick