I appreciate you trying to learn more about the method and place of entry into NG's home because to me it seems like such a wild card question, given how large the home is, it's all one floor - who's to say the perps even went through a door? Could have been a window. Or multiple entry points. I don't think we even know if she has a security system and if so, how it operates (just movement in the home, just open/closing doors, windows?, was it on that night in its full capacity? sometimes people leave them off - she's lived there decades or forget especially after a late night). Broken into or keys/codes used? Entries already unlocked? Happens a lot where I grew up, less likely in Tucson I would imagine.
The weirdest thing about the Nest cam footage we've seen, to me/MOO, is that they were even at the front door, given all the other possibilities.