Door placement

My teardrop is going to be 2700mm, the metric equivalent of 9 feet, long. Axle placement about 65/35%.
So, I have plenty of room in front of my wheels to install my doors.
These are new aluminium framed doors from Aussie teardrops.
They require a hole 900mm by 622mm.
That'd be a touch under 36" x a touch over 24"
I sat up on my bed at home, and measured the centre line of my body at about 900mm from the bedhead.
So, If i put the vertical centre line of the door at 900mm from the front, the leading edge of the frame will be about 600mm (24 inches) from the front of the camper.
I'd then aim to have the bottom edge of the frame about 2 -3 inches off the floor, soo when I'm sitting in the door on my 6 inch mattress the door frame doesn't dig in.\
Sound about right?
So, I have plenty of room in front of my wheels to install my doors.
These are new aluminium framed doors from Aussie teardrops.
They require a hole 900mm by 622mm.
That'd be a touch under 36" x a touch over 24"
I sat up on my bed at home, and measured the centre line of my body at about 900mm from the bedhead.
So, If i put the vertical centre line of the door at 900mm from the front, the leading edge of the frame will be about 600mm (24 inches) from the front of the camper.
I'd then aim to have the bottom edge of the frame about 2 -3 inches off the floor, soo when I'm sitting in the door on my 6 inch mattress the door frame doesn't dig in.\
Sound about right?