MVP in Wordpress

Hola! I'm thinking of building a MVP in Wordpress, and I would like to know how much it costs a site with a landing, a form to signup/login to a private area, and then in the private area a button to upload files, and a visor to see these files, download them, delete them, and the basic functionality of a private area, delete account, logout and edit personal data. Users only will see their files, it is not a shared repository. I understand that this is an easy development, and that the only a little trickier is the private area. I can sketch some handmade wireframes if needed. My goal is not to have something beautiful, is to have something functional and cheap in a short time (I accept to use templates and plugins if the functionality work as I expect). It is a MVP! :) If it works, it would be a second phase. I have the hosting and the space in AWS for the files uploaded by the users, so all these operations will be done by me (I only need the site). I will configure all the needed to connect the site with the systems, you only have to explain me where I have to configure the connectors to my them. Please, don't hesitate to contact me for any doubt. If you need it, we can arrange a meeting for explaining further details. Many thanks. Kind regards, Héctor