I finally fixed all discovered bugs and desided to share final source code for people. Blender Next for Unreal Engine is now yours forever. Feel free to modify and extend the functionality of this build. Who knows, may be this is first step to future of gamedev. "Aim to the moon, even if you miss you may hit a star..."

Source code and finished build available on this post:

1) I spend a lot of time on development. I want to earn something for a living.

2) I can sell my own version of Blender, according to this FAQ from developers website. https://www.blender.org/support/faq/

What about future developent of this build? Source code of Blender Next is licensed under GNU GENERAL PUBLIC LICENSE. Version 3. From my part I will say the following. Everything depends from the support of the community. I've done everything what I can according to my limited C++ knowledge from university during almost 2 years of developement and fixed all the errors that I found.