Update of WP-plugin: Expert in WooCommerce, WP and design etc. for ongoing work

Hi We are looking for an expert in WooCommerce, WP, design and all the other tasks that needs to be done by a webmaster, when running a site and webshop. We have a number of tasks for the right person. We value proactive experts that can tell us what we need to do and do it with excellence. First task is to update our material calculator for different wall boards. We like to have a fixed price for this project. If we expand the workload in the project, you get paid for it. We already have a calculator that is little outdated and is only used for one brand of boards: [login to view URL] It is made as a wp-plugin. Here are the competing calculators: [login to view URL] And here: [login to view URL] We need 1) One calculator that can do calculations for three kinds of boards with accessories and the abilities to add more boards in an efficient way. 2) Easy abilities to remove steps and features like: Only have one kind of board, see price, send calculations and get a call can be added/removed etc. 3) We need to have 3 calculators on the site. One with only SkamoWall boards, one with Multipro boards and one with both kinds of plates. (if we make one calculator that can do it all and then add the ability to hide part of the calculator when we make the more specialized calculators) 4) The design has to be updated, so it looks better than the other calculators. It is a little bit messy and needs to stand more sharp. 5) We need to add a selector in the top, where the user can choose(checks boxes) which kind of boards they want to calculate. We have: Skamowall Living, Skamowall Basic and Multipro a) The Skamowall boards have the dimension: 1000x61 cm. - Skamowall Living can be ordered in width: 30 mm - 50 mm - 100 mm - Skamowall Basic can be ordered in width: 25mm - 50 mm - 100 mm b) Multipro boards have the diaminsion: 600x39 -Multipro boards can be ordered in width: 60mm - 80 mm - 100 mm 6) If a board has less than 50% left, it is considered as it can not be used any more. 7) After the user has clicked Calculate(Beregn forbrug). The user will see how much products that is used for each of the chosen boards and a price for it. 8) For each brand the user will be able to add accessories that belong to that brand and other relevant products. 9) When the user have calculated how many products they need and the price, they can: a) Add the products to the shopping basket (open in new tap/window) b) Send calculations (to us) and get expert help. The user can write Name*, address, Phonenumber*, email* and comments. 10) We need to add painting as an option. Where we use 0.083 liters AURO Dybdegrunder and 0,33 liters AURO Profi-Silikatmaling per sqm. All rounded up to the nearest product size. We like to make it a long term relationship. So beside of getting a price of the project, we like to know: 1) What is your hourly price for additional work(app. 10 hours a week in the beginning)? 2) Are you available for updates and make additional work in the future? 3) What is your experience in WooCommerce, WordPress and making plugins? 4) What are your experiences with designing and optimizing shops and websites? 5) Can you upload products and clipping + optimizing images? 6) If there are some tasks you can’t or won't do, can you outsource them? 7) Have you tried the calculator? 8) If you were to improve the site/shop, what would you do? Please get familiar with the plugin and answer all the questions. Thanks, Brian