Hello, we are expert on marketplace setup. We have complete knowledge about the marketplace functionality with many features on magento. We shall assure to deliver the mobile application perfectly sync with your magento website as expected with all the features and even more features can be delivered based on your budget. We shall discuss over the chat to clarify more in detail. As ecommerce marketplace, we shall also help in marketing, advertising, seo, designing, product management solutions. We are new to freelancer, but not to the ecommerce industry. We have 3 years of experience :) If you have magento marketplace website development, we are glad to work on it as well.
Regarding 40 hours per week, can be dedicated for your tasks on regular basis as per your quotation.