Hello!
This project sounds very interesting, besides the considerable budget (compared to other projects on this platform).
Most of the projects I worked on are started from scratch, so I think I'm a good candidate for the job. In terms of UX I can offer you many advises, too, for the future features to include and the best way to do it.
Also we can find the best way to send-receive the deliverables (let's say a milestones system), so that the progress is visible and probably the payment to be split into chunks according to milestones, an initial payment and a final payment.
In terms of English, I stay better at writing. Also email conversations is preferable, as we can analyze better the entire progress.
To be fair from the start:
1. Freelance is done as part-time. I have a full-time job. So I can allocate to this project 2 hours per weekday, and 6 per weekend day (i.e. 22h/week = 88h/month (most probably more)).
2. Between 21st and 29th of August I will be away on a family holidays, in Italy, so this 8 days period won't be considered for work.
Additional comment:If you want to get the best out of your project, I recommend you to include Telerik Controls in the solution. They will offer a way better display and performance than the standard controls with a theme/style applied to them.
If you are interested, please let me know your thoughts!
Warmest regards!
Adi