Doesn't have to be super powerful, just lifting about 100 pounds, frequently. I've already looked at the normal places, and they are all DC powered (car battery). I suppose it could also be manual.
Go on-line and look up Northern Tool. They have just about everything including an electric cable winch. Speaking of winches, do you want my ex, she has no power at all.
With no offense to answer 1, but in agreement with answer 2, ONLY through experience with both big LOT outlets; I'd probably try Northern first. In fact I just had a discussion with someone yesterday comparing the two; but again; it's personal preference. It's likely they get their inventory from the same distributors. For 100 pounds, and if geared at all, manual could be fine. One issue might be your intended use; portability; possible access OR NOT, to a power source; etc.
For manual, try Harbor Freight; I have one in the garage. that should be good for 100 pounds. And verrrry portable.