Create Visual Composer Add-ons

Hi,

I require a Web Developer to create the following Visual Composer Add-ons.

The developer must follow the Visual Composer Add-on rules as stated here: https://wpbakery.atlassian.net/wiki/display/VC/Add-on+Development+Rules

And use the following Plugin example as a base for creating the Add-ons.
https://bitbucket.org/wpbakery/extend-visual-composer-plugin-example/downloads

{ Counter }
Requires the following options:

- Value
- Description
- Color Picker

You can use the following jQuery script to calculate the counter:
http://bfintal.github.io/Counter-Up/demo/demo.html

{ Countdown }
Requires the following options:

- Pick Date ( from a jQuery date picker )
- Hour
- Minute
- Size ( Small, Medium, Large, Extra Large )
- Color


{ Catalogue }
Requires the following options:

- Title
- Description
- Price
- Thumbnail ( choose from Media library )
- Link
- Ideally needs the options to enter a manual URL, select Wordpress Page or Post from a list, lightbox

{ Typewriter }
I'd like to turn this jQuery script into a Visual Composer Add-on:

http://codepen.io/drocarmo/pen/rsjzp

Requires the following options:
- Add Multiple "Sentences"
- Color
- Size ( Small, Medium, Large, Extra Large )

Ideally the developer would be familiar with Visual Composer add-on development and has created one already.

Skills required:

- English Speaking
- Web Development
- WordPress
- Visual Composer
- Javascript / jQuery
- PHP
- CSS

Please provide a quote for how much this would cost.

Kind regards,
Andy