Your immediate response was that if you can't get help, you fail. Piss poor attitude out of the gate. First change is right there.
I run a full time farm, I'm on call 24/7 as an independent consultant/contractor, have 4 kids, building my house, 3 lawns to mow, fields to plant... etc. Yea, I have a lot of shit to do too. That's life.
Asking is a good start. That chart, also a good start. That chart is giving you good numbers to work with and heights. Use your meter at 18", record your lux at those locations. Use it as a cross reference to find the right height. That's about all the advice I can give you. I don't know shit about these lights.