Stroke, Unable To Swallow, No Speech, Breathing Difficulty, Weak Lungs, Pneumonia. Had Bypass Surgery. How Long Will It Last?

My husband had a 4 bypass surgery last week, 3days later on telemetry floor, MD concerned about pneumonia, he is Bach in ICU with a left sided frontal stroke no swallowing, speech, dificulity with right sided negket, was on CPAP unit for a with breathing , unable to tolerate and too weak to clear lungs him self , he was re intubated NGT inserted to give meds, if 40-50 % on frontal lobe infart ,in present , ocurred last thur fri am, what changes if any, for regaining any functional mobility, they have started to wean down vent , Is it too early to be starting semi agressive PT services, with ROM ex, poss sitting on edge of bed while still on vent , Talk about poss of trach if he breathing on his own, would trach be ONLY for his swallowing deficits and speech. I am looking down the road and it may be too soon, for my answers to be answered, but is there a% of salvageable recovery with aggressive LTC facility , Thanks so much what am I looking for, CABG is doing great, his left carotid artery was already blocked and no stens placed, right side was stenting Nov.. last yr, Is there a time limit on when brain had first stroke last thurs to know how long does a brain take after swelling in brain slowly resolves and pt able to participate in therapy