Non-Cash Acquisition Structure?

I'm working on a non-cash acquisition of two entities in complimentary fields in Healthcare. My question is how to provide capped value for the current founders and allow me to benefit from the upside of vision an growth beyond current financials and company value. This combined entity would be $4M REV and $700K EBITDA. There's potential to swoop in with CASH as well if needed, but trying to be creative on structure. Feedback welcome!