Electric tongue jack

Personally I don't think many do need anything more than a 3500 lb tongue jack. However, what I would warn you against is that "Arksen" which you've linked to which is an cheap Chinese knockoff of the original UltraFab 3502 which I guarantee you won't be buying for as little as $86.97. :R I almost fell into this trap myself, unforgivable especially because I previously owned an UltraFab tongue jack and knew they shouldn't be selling for this little. Well, they aren't - authentic UltraFab tongue jacks are much more ... I have one now sitting in my workshop waiting to go on my trailer in place of the LCI tongue jack that originally came with the trailer. There are plenty of tongue jack out there, just make sure you know what you're actually buying. ;)