Video Tour shooting method

[Adam Symes]

Hi guys! I'm shooting a video tour for a company on a restricted budget (as close to zero as possible :/ ), the goal is to create a high key video tour of the premises in a narrative style.

I want to make this a POV or possibly a Subjective tour. Ideally the shots will be smooth with no shake and I'm hoping for suggestions.

Sadly renting a rig is not financially viable at this time.

I've had the idea of using a GoPro and I'm hoping somebody has had experience in using one, going from moderately bright exterior to dim interiors in one shot. Does the GoPro auto expose and does it change drastically based on the image?

Any ideas for pulling this off using a DSLR? (Nikon D800, pretty heavy with the 24-70)

Any advice would be greatly appreciated guys, thanks a million for reading.