316 h3 h1 140

I have joined this forum because my dad has owned John Deeres since I was little and they just keep on chugging. Hes now up to 4 of them. I am purchasing a piece of land that warrants the use of a tractor and I think that a Deere is the way to go. I'd like to start figuring out which tractor...

What additional functions are available with the addition of hydraulic circuits? what is needed to add the additional auxiliary functions other than the lines? I have a 316 with a single circuit. The he 318 has 2 and I believe 400 series have 3 as does the 140 h3. I have also seen a solenoid...