Moving on then....

Don't just look for a DSC with a built-in timelapse. You might also be able
to get one with an electronic cable release that does the same thing. My
Coolpix E5700 doesn't have the facility built-in, but adding a MC-E1U remote
release means you can take an unattended picture every two minutes.

Work backward from how long the projects is likely to take (to build) and
how long you want your film to last. Then divide them up so that you know
how many images you need to take per working day. Then shoot at least twice
as often, more if you can (it gives you the flexibility to slow down
sections where a lot changes in one day). Then work out how big your media
cards need to be.

Don't be afraid to move or zoom the camera periodically, just for an
alternate camera angle - just make sure that the resulting cut is going to
last longer than a split second!