Electric for sure.
Frankly, if you are going with 10 gallon batches, I would consider a 240 volt all in one system, like the bigger Grainfather, the Brewzilla or one of the new component built systems like SS Brewtech or Spike Brewing or similar. Add a game hoist for pulling up the grain basket and you are pretty well set.
I have the Anvil Foundry for 5 gallon batches and really like it on 240V...my larger set up is a 9 gallon HERMS liquor tank with immersion coil (3500W element), 20 gallon InfuSSion Mash Tun, with an 18 gallon Stout Tank (all in one using only the main kettle anymore). I use 400 micron Brew Bags for all of my brewing to eliminate grain pushing through on recirculation.