OK, Looks like I have got it working but I'm not 100% sure if this is the way it should be done.

Step 1.

Sent Model Binder mode in the web config to DLL with the following settings

<add key="Umbraco.ModelsBuilder.Enable" value="true" />
<add key="Umbraco.ModelsBuilder.ModelsMode" value="Dll" />

This will cause Umbraco to generate model classes based on your Document Types. - (by clicking generate models button) which are located in:

Umbraco.Web.PublishedContentModels.dll in the bin folder. of your .Web project

Step 2

From the .Core project Add a reference to Umbraco.Web.PublishedContentModels.dll the bin folder of the .Web project.

Now in your controller classes in your .core project you can now use your strongly typed Generated model like this:

public ActionResult Index(HomePage model)
{

        var myvalue = model.SEotitle;  // Look strong typed 

        //more logic here
        return View(model);
}

Would love to know if this is how others are using model binder in cloud.