I installed one myself because ours died the same day we were having company and we had no place else to cook the Swanson TV Dinners. Wasn't easy not because the PROCESS was hard (it was very simple - basically just need a drill and a tape measure)
it was just heavy trying to hook on the bracket then lock in the front. Point is, don't look for an engineer with a graduate degree in appliance installs who is going to charge you $300 to install it, just find someone who has done one or two before and knows what they are getting in to and has the tools. Should take no more than 30 minutes if they have done a couple. Got ours at Best Buy right after last Christmas ... it was an "open box" LG that was on sale for $99 and sold on Amazon and other places for $350+.