So, I've come across a bug where it seems that whenever a character starts the Dawnguard questline the game starts to randomly crash spitting out an C++ error. (R6025 - pure virtual function call)
I've gone so far as too deleting every single file related to Skyrim, downloaded it again, and began a new save, completely free of mods except of Dawnguard and Hearthfire, still crashes.

Now, the solution seems to be either to disable Dawnguard altogether or downloading a mod from the nexus that prevents the main questline from starting.
However I still want to become a Vampire Lord (they're friggin badass!), so is it possible to become one through console commands or some mod?