A few weeks back I accepted a job that required shooting tethered. I don't normally shoot tethered so I didn't have the cables or a place to set my laptop that would keep it secure and accessible. Now Tethertools is a company that offers solutions explicitly for this problem. The reviews for their products are always glowing, I constantly see them recommended for tethering, and all things considered they seem to be the best route to go for regular tethering. But for someone like myself it doesn't make sense to spend that sort of money for products I'd rarely use. Luckily, with a bit of searching, I found these alternatives below.
The Samson LTS50 is sturdy and fits my 15" Macbook perfectly. It comes with a sticky pad to adhere to the tabletop to keep the laptop from sliding around. I still used a long piece of velcro around the laptop and tabletop for extra peace of mind. I paid roughly $50 for it.
Oddly a long USB 3.0 cable was hard to come by at the time but Amazon does appear to stock them now. I went with a similar 15' cable in blue for a few dollars cheaper on Newegg but with Amazon's free shipping it's about equal in price. I paid around $5.
Lastly, when testing out the setup there were some instances of the USB cable become loose from my camera causing photos to drop. I used a velcro cable tie around the cable and into the neck strap loop on my camera to secure it. Worked surprisingly well and no longer had an issue with the cable coming loose. Paid roughly $5 for mine but you can get find them in any quantity it seems.
All in all, I paid around $60 for my whole tethering setup and it worked great. The stand extends and pivots for great viewing, the cable transferred D810 files in seconds without dropping any files, and everything was secure with velcro strips. For me and my needs, these offered an affordable solution that worked without issue.