Thank you for your question. I can respond for Jeff. Keep in mind that the ROBS will fund one 401(k). However, the 401(k) can be funded by more than one ROBS. Therefore, more than one person can fund the 401(k) via ROBS. For more details, see our article on How to Set Up a ROBS and you can also look at IRS guidance on ROBS.
I hope that helps!