Advanced Wordpress development

Hi - we have recently started on an advanced Wordpress site using the WPcasa (http://wpcasa.com/) theme at it's core. As a result of family commitments the developer we started with cannot finish the job and we need someone ASAP to come onboard and get this done. He is available to chat to as needed and will be able to provide some basic documentation as to where he got too.

It's not a massive job but it does need focus and working with me 100% clarity on what we're trying to achieve.

Most of the 'hard' work (importing existing properties) has largely being done but there is still a fair bit to do including giving the site a new look & feel and working on a number of 'bespoke' backend functionality that the WPcasa theme/plugins don't provide out of the box.

I'm not sure how to price this job so whilst it's not a fixed price I do want to ensure we know what we're going to spend in order to complete the job.

We need this doing ASAP as we're already quite behind on the project so when replying please let me know when you have time to work on this.

If you've specific examples of working on WPcasa then even better - the principal skill is a detailed knowledge of the backend of Wordpress and how to leverage that within a framework WPcasa.

Thanks,
Simon