$2000 !!!! no way in hell I rather buy an ADD rear bumper for that money. NO way Sergei....
There are more than a handful of people who are at the point where there are very little mods left unless they want to cut the truck in half and link it. Definitely not on my priority list, but the Sync 2 to Sync 3 conversion is on my list of things I would want done. Plan on keeping the truck for many many years and the clunky Sync 2 has got to go.
Think I read somewhere that you might be able to get one out of a wrecked 2016+ F150 and just use the mounting frame from your current truck. I got bored on weekend to see what it would take to do and while it was pretty involved as a DIY, it's definitely possible to do for far less than the $2000 listed.
Edit: Check google. There is a thread on another forum with a full write up for 2015 trucks w/ MFT to upgrade to Sync 3. While I'm sure there are a few different steps I would bet a lot of it is similar.