"our condition of being alive in this self reflective mode, is only possible because something is ‘elsewhere’ and thus capable to look at this ‘somewhere’."

Which requires space (or equivalent), as I've already mentioned, and all those problems associated with it. It's basically just shifting goalposts.

"While the source may reflect itself through its evident manifestations, sustaining it all, it must have it’s own domain, apart from what we in our human form see and can experience."

Why? First person perspective (i.e. that which knows) can let the human recognize as much experience of itself as human is able to "reflect." And this "exchange" can take place exactly because there's no other domain. No matter how primitive human perceptual world would be/is, human by the nature of being absolute can know it/themselves.

"The painting was created by something other than itself."

Naturally. But technically, universe just turned itself into painting. Just saying.