The git being empty is a bummer.I just finished building DU pie for the bullhead (Google Nexus 5x) so I will start tomorrow building for the tab S2.
It took me lot of time because I never did all this before but now it will be lot faster.
PS: I'm at univeristy(computing engineering) so I'm not doing this full time but only in my (very small) free time.
---------- Post added at 09:28 PM ---------- Previous post was at 09:14 PM ----------
Also as bonuzz don't share his work (nothing available on his github), I will take more time...
If you have to start from scratch, maybe it would make more sense to make a LineageOS 16.0 rom instead.
There are a few for the T713,T719,T819, and T813.
Perhaps you could use them for a base to work from.
Regardless of what you spend your time on, thank you for considering to work on the T710.