Advanced form fields plugin for RSDirectory like RSFormPro

RSFormPro has an extra plugin "Advanced form fields".
It could be good idea to develop and sell a similar plugin for RSDirectory.
I would buy it, definitely. And I'm sure I'm not only one.

There are many requests for the additional fields and functionality.
I already left a feedback requests for
- Dropdown multiselect field allowing charge for every selected item (plus it could have Selectize as implemented in Advanced form fields plugin)
- Data picker field with same functionality like RSFormPro
and so on...

Thanks for your attention,
Best regards
Serge