This can be a long row to hoe, but the resilience of the brain can be amazing. My brother had a similar injury ~10-12 yrs ago, weeks in hospital,vent, induced
coma, subdural drained etc. Slowly came around and began recognizing family, talking a bit and slow slow improvement over months. By ~ 1 yr he was high functioning though not as before, went back to his one man business which he has continued to effectively operate ever since with 6 figure incomes.