My only concern with your setup is the length of the wires inder the hood... There's a lot of exposed cord length draped across 'stuff' and the insulation on the wires can chafe through over time. Shorted wires can do a LOT of damage at far less than 50A without tripping a breaker. My dad's Jeep almost caught fire in our garage thanks to the winch cables doing just that.
I'd look at using an Andersen connector securely fastened in a fixed location. out of the way with a dust cover on it to keep the grime out. I use them as a main battery disconnect on our camper, and have been quite happy with them. They also provide a quick means of powering other 'stuff' from the camper if needed. I've considered using a similar setup to yours in a pinch if necessary, but I personally wouldn't make it my primary means of charging. It's just plain inefficient, and if I needed to do it more than a couple times a year, I'd be looking at a genset.
