Joomla 3 / Custom component

We need a custom Joomla component per client need. It should be simple for the user and admin. ABOUT THE PROJECT The client needs a website where the users can select the predefined wooden home design. They should be able to select then several doors, type of doors, number of windows, type of facade... How some user is changing this should be changed on the right part of the website as an image. It should be in simple steps. We are using all websites as Joomla CMS and that's why we would like to have a custom created Component. We have Targa and BMP files. We will prepare you all steps with explanations step by step. What is the concept and client idea? When a user arrives on the website then they will see a simple front page whit some minor information. They will have a link: BUILD YOUR HOME. And then will open a link with a nice design (UI) that should be simple. User will now select type of the home and will go to the next step, will click next, then he will select some information as size of the home (we will provide a options to select), then they will move to the next step - select facade, then next, number of the windows, doors, doors type, type/color of roof... Anything selected is changing in real-time on the right side of the website. After the user completes all fields that should enter they: First and Second name, email and phone number and he will get a msg that this is "not obligatory" offer just information (we will create you some msg). And they should be able to download this as PDF. The user got as well an email of confirmation with a link for download the PDF and the admin gets a new email as well with information about the newly created home/user. The user can come again and should be able to open his created file and edit it online (not the file then the created home). Something as simple History with edit and save as new "Home". Everything should be very simple. The website will be only so far in the Croatian language (UTF8) and English. This means that the multilanguage should be predicted and implemented as well (as simple ini fields/files). Your work is to build a custom Joomla Component / user-friendly where each user can in simple steps generate their wooden home per available design. It should be super simple for booth user and administrator. We will provide you a full description of the steps and images for building the Component.