Various questions before purchasing

Hi, I’m going to buy the PRO version of your plugin. I have some questions:
I would like to set up a cronjob to automatically import posts from some xml files.
If there are multiple xml files when the cronjob is performed are there problems?

I need to export posts from software (on a server external) to wordpress. Is it possible to include an image in an xml / csv file?

Can the image caption also be imported?

If I have already imported a post via xml, is it possible to update the text of the same post later by importing another xml file? By post ID? How can I do? Do I have to import a new xml file with only the text and id of the post, or with the whole post (title, image, tags) the same but with the updated text?

Is it possible to import posts that must not be published immediately but must be planned?

Thank you.