Projector help please.

[lwrighty]

Hi all.
I really need some help to decide which projector to go for. I realise I need a short throw projector but not sure which one.
Is it ok to angle a projector downwards to avoid the apex of the roof?
The screen width will be 385cm

Drawings of the cabin are below / attached.
The models ive been looking at are.

BenQ TK700STi

Optoma GT2000HDR but this has no zoom.

Any advice greatly appreciated.