I'm new myself, but I wonder if the auto-resolve is more attractive at a harder difficulty level. It's devastating on the default easy difficulty, but that's probably because battles are so darn easy when your men take half damage. If you're knocked out, and your troops must fight without you, do you end up with the casualties that you would expect anyway?
As far as money goes, I have found that building the most profitable enterprise according to what the guild master says is pretty darn stable. You could check out the villages associated with the town to see what raw materials they produce, but the guild master's estimates are good enough in my experience.
Another way to make huge money as a neutral is to hang around the front line of wars and take a town that was recently captured. Occasionally you can catch a town with a garrison as low as 50. If you succeed, you immediately seek the protection of the original faction that owned the town (you'll have to meet with the king ASAP so make sure you know where he is). If peace is made quickly or perhaps before you took the town then you won't have to defend it right away, and the king will allow you to have the town plus all the associated villages as your fief! Since most of your troops will be dead you'll be raking in 30,000 a week with an easy to defend territory to build on.
I imagine that winning siege battles on the hardest difficulty would be quite difficult even at even strength, but you have to start somewhere.