The only problem I have heard of was people holding the button to long and burning something out. Not shure if that makes it lock up. But they did a fix by adding a timer in the box so it times itself out if held to long. You only need to press the button for a second.
I did not like the button that came with mine an added This foot switch.
We may be down sizing also. The biggest problem is with the front over hang. 75% of the ones I have seen have some sort of water damaged or delam.
These are on my short list right now.
Here is a 2014 asking at the top of your budget.
Also if your looking to keep it simple I would look into towing four down instead of a trailer or dolly.