Nothing against electric reels, but I have used a Hannay van mounted reel for nearly 12 years now and would guess a lot of people with shoulder issues from manually reeling in, is due to using poorer quality reels, also not having it van mounted.
My Hannay was nearly £300 with the VAT 12 years ago, but I have not had to replace a single part on it.
I would be tempted to try an electric reel at some point, but never get why people want to spend so little, on what to me is a very important piece of equipment.