May I put a lien on property, with the owners cooperation and what forms, process do I need?

The lien would be to secure repayment of a loan to the property owner.

Why would a property owner agree to a lien?

It depends on what the lien is for as to whether you can do it with just their consent. But the forms can be obtained from the county clerk.

Yes can you please explain what the lien is for, a loan,

Please do not start a new thread to answer a question we ask, for any follow-up please place it as a answer to your own question, Most viewers have no way to match up answers lost as new questions.

I have merged your two posts

But you say it is to secure payments "TO" the property owner,
Do you mean to secure payments FROM the property owner to someone else, so that property owner is allowing the loan to give security for the payments they will make, not payments to them??

But a loan agreement would be drawn up showing the property was to be used as security. You should be able to get a lien form from the clerk.
If not some of the online form places, goggle lien forms and your state,
But to be honest, if you want to be sure this is all done right, pay an attorney 200 to 300 dollars (shop attorneys) and get one drawn up properly

If you are loaning someone money using the property as collateral, then you need to get a promissory note signed by the property owner that states the property will be used as collateral. You can take a copy of that note to the county clerk and have a lien placed on the property.