Build a Website 3

Hi I need a website built for me but ideally I want it done from an unfinished website that was created but is incomplete. The website needs to be able to have to separate logins. One for my customers and 1 for potential staff members. The website needs to be able to send out notifications/emails to staff members when customers register that a job needs doing. The incomplete website was made using Joomla and ideally I would like the template from this to still be used. I need the website done within 3 weeks. As I already forked out quite a bit to get it started I still only have what has been left over from the budget. If you have any questions and you feel you can complete this, please do not hesitate to message me or apply. I need a website created that is similar to the Uber website: [login to view URL] in terms of being able to make bookings, take payments and for users to either sign up and login. I also need users to either put their area postcode or have the website prompt them to use their location to find a mechanic. In which this bit has been done but a notification needs to go out to all mechanics once a job has been raised and this part hasn't. I'd also like for an email to be generated to to the mechanics/staff personal one once the job has been accepted by the mechanic along with the notification. The website needs to be able to take payments once jobs have been created. The Uber website has a banner advert at the top saying something like do you want to drive with uber? I want something that says Join BBA? Clicking this will lead to 2 further links which prompts you to sign up as a BBA mechanic or to sign up as a cyclist user who needs to book a job. When a mechanic wants to join BBA, the website will give them area options or postcodes to choose from on where they would like to work. This will help them get notifications for raised jobs in their chosen areas. I also want a diagnosis tool that looks like a bike where a user can touch or click on the area of the bike that has broken down and the site can give a rough estimate of how much the job will cost. I tried to make this as clear as possible. If you need more information or this is not clear enough, please let me know and I'll happily answer any queries.