I have several rifles built on Turk Mauser actions and I used Rem700 take-offs on all of them. As far as difficulty goes, threading isn't the simplest operation on a lathe, but it isn't so difficult that someone with good access to a lathe can't attempt it and be successful. I say "good access" because you will want to practice (and make all your mistakes!) on some round steel stock before you chuck your barrel and go for it. One thing that you learn about threading is that you are 100% committed once you start to cut metal!
The nice thing about the Rem700 threads is that the minor diameter is just a hair larger than the major diameter of the threads on a small ring barrel.
You will still need to get a chamber reamer to finish the chamber, because the Rem700 extractor goes into a notch that is cut in the Rem700 barrel ... this means that even with the 1938 Turk action you still end up removing some of the chamber ... but not nearly as much as you would with the VZ-24.
I asked a BUNCH of questions about this project here and got a TON of help. This group is a great resource!
Saands