IMHO, a "cordless" starter is the only way to go! I've been using one for several years now and would not go back to a corded variety and panel.

My setup consists of the 12 volt starter, a rectangular piece of lexan, 12 volt 7ah battery and two large cable ties.

The rectangular piece of lexan is bolted to the bottom of the starter and then the battery is cable tied to the lexan. I've also drilled and tapped the lexan to hold extra glow plugs.

Works great. Very similar in theory to the hobbico power core setup but with 5.8 times the capacity.