Good to hear you're fighting back and making progress against the medical odds based on Mr Average. My thoughts from from a distance based on events so far.
You have the experience and you're demonstrating the determination to make the business work adapting to your capabilities as they continue to recover. I'm assuming you already took on assessment, advising customers and pricing based on site visits as well as the admin so your challenge will be largely the same as before the incident, reliable and experienced staff who you can trust to do the job to your required standard, safely and efficiently whilst you add value bringing in more work and diversify into new fields such as consultancy that can add income and value to the business. You are already making things work for you with hiring out kit.
My experience post survived major trauma over 30 years ago in a previous career. Circumstances are different but may either explain some things or give food for thought as you continue your journey. The physical recovery as the leg knitted together was easier than the mental recovery which took years, though I had been banged about the head as well with memory of the incident and suppressed consciousness for 2 weeks, hopefully you haven't sustained any concussion being thrown. My key mistakes were 1. Turning down help when a colleague noticed there was something wrong, which I knew by then but was too scared of being let go from a career I loved. If help is offered please try it and if it isn't offered seek it out if you're uncomfortable rather than trying to hide it like I did. 2. Trying to get back to normal too quickly, 2 months after being released from hospital with a leg that required further surgery, no accurate memory, short or long term and expecting to perform to or close to the way I had before. Unrealistic and lead to frustration and a very short fuse. Again this was really trying to hide the problems I had and just made everything worse. 3. Just taking the cocktail of tablets I was given without considering side effects, one of them was infamous for causing short term memory issues.
Not the easiest to write and I'm sure I have missed stuff that will come to me at zero daft thirty. You've got the ability and drive to make it work for you and your family, try to be honest with yourself along the way and trust others close to you to help when needed. Best of luck for the future.