I think initial multi training has confused this issue a little. There is no minimum altitude at which a normally operating aircraft can no longer attempt to go-around if the need be.
I have noticed with some people a confusion resulting from the selection of decision altitude with respect to an assymetric approach.
You will also have noticed landing performance charts have a climb weight limitation...
Just one final suggestion....
If you find your on final trying to decide if you need to go-around- you already do!
oh, I did raise an eyebrow when you said earlier " I know what the manual says, but.."