How do I get financial cooperation?

Your previous question concerned purchasing a bigger trailer. Now its financial cooperation. From who? From your Dad? (which u do need to delete his name) From an agency? We can't help without knowing what your problem is.

This person has posted before with no info given

https://www.agingcare.com/questions/i-have-a-small-mobile-home-could-i-get-a-larger-maybe-just-14-ft-wide-3-bedroom-455351.htm

What type of help do you need?
I suggest that you remove the full name of your father from your profile. So easy for nasty people to get a lot of info from a name and a town.
You need to provide more info so that "we" can provide more detailed information.

You need to be more specific. Financial cooperation from whom? And for what?