Hi,
I am a professional wordpress plugin developer. I can integrate the deposit extension with your custom booking plugin.
I know almost all hooks/filters of woocommerce plugin and to integrate smoothly third party plugin/theme. Even few linux "grep" commands may help find new hooks after new releses.
As both deposit extension and booking plugin are separate plugins, I think it would be good idea to write a new plugin to combine their functionalities. So, what do you think ?
Looking forward to hear from you.
Regards,
Mahibul