I like your thinking. You will need to think outside the box to survive going forward, imo. Especially when it comes to procuring land if you don't already have it.
My suggestion is to put yourself in their shoes. If you had land and cattle, what would it take for you to let some one else add their cow to your herd?
I started out in your shoes and now I'm slowly becoming the person you will need to approach with your proposition so here are my thoughts.
Cash is not really of value to me. Sounds funny right.

You would have to have a business model better than mine where you could pay me a higher rent than what I could earn on my own cow. Your cash offer would have to beat my returns plus the cost of the hassel/ liability.
What I am short on is... #1 Time... #2 Reliable help. If you can provide those two things it will be of great value. Just be careful on your end not to go in the hole on that because it's really easy to spend way more than that one heifer can generate you.
Lastly, be flexible. You will be on their property riding their train. You will feed what they feed, breed to what they breed to, etc. Be ready for that. It can be great to get in the game but frustrating to not have input on the play calling.
Good luck. Leases and opportunities are made by doing things like this if you get in with the right group.