Build a product (car) configurator

I want you to build me a car configurator where various dependencies are possible. The configurator should only load the contents that it needs at the beginning and then successively load the other contents depending on what the user selects. The configurator can run on itself or you can choose any platform. Basically, I can provide used cars (for selling) with a lot of options. It will be much easier for a potential customer to check desired options and I can find him the best option available. That's why I need an easy intuitive and interactive solution where he can start by choosing: - maker (company) and desired model (from a drop-down list or if you have better ideas, please do) - the color (I'd like to have some patterns displayed also, not just the name of the colors) - engine - and here we go with options (leather, automatic transmission / no, klima / no, etc etc etc). The customer should be able to select anything he likes and after that, he should be able to leave some info in order to be contacted - usually his name, phone number, and an e-mail address. The customer should be able to create its own profile, should be able to log in with Facebook/Gmail profile and have his own history or order. Also, a mobile app would be good to have but at this point is optional. I'm not looking for the cheapest solution, I'm looking for the most interactive, easy to use, secure and fast loading solution with its own database and, of course, easy to be handled as an administrator. I know that the quality is never cheap. So, don't look at the budget I chose here, it's random. Just convince me that you have the best solution and we will negotiate the best offer for sure. I will wait for your answers max. 1 week. Timeframe: we can discuss it later, I understand what I'm asking and I know that it can't be done overnight. Payment by milestone once the result is delivered and working in our test. Apply now if you are interested. Gabriel