"Is there any way how to this? I read the Blueprint will be available only from editor, so is there any other solution? "
You absolutely can interact with Blueprints from c++ !
I do it all day!
To answer your question, yes you can spawn Blueprint Actors with all your custom setups straight in the C++.
To answer all your other unasked questions:
You can do anything in c++! UE4 C++ is amazingly powerful!
Rama