Stripe Save Credit Card info for later charge date

My client, runs on Wordpress. It’s a clothing delivery service. How it Works: Once my clients sign up, they can request a box of clothes by paying a $75 Style Deposit. After they request a box, I go out and shop for my clients and then package and ship them the clothes. Once they receive the clothes, they have 5 days to try everything on and see what they’d like to keep. They send back whatever they don’t want. At this point, I currently send my clients an invoice for the clothes they keep but that leaves me vulnerable and they sometimes end up never paying. This is the problem. What I need: I need the ability to charge my client’s encrypted credit card information. I’ve done some research into how to do this and this video on YouTube basically explains how to do it but I’m not development-savvy enough to incorporate it into my Wordpress site. I currently have a third party plugin called TypeForm integrated into my site. It’s great for collecting responses to forms but it doesn’t fully do what I need. It does collect the initial $75 Style Deposit but I am not able to charge the client later for the items they end up keeping. This YouTube video basically shows how I can do that. I'm OK with getting rid of Typeform and creating a simple form on my "Order Box" page. I’m looking to get an idea from you on how long you think it would take. I reached out to you because I saw you had experience in Wordpress Development and Stripe Integration. I'm thinking it would take about 3-4 hours but let me know how many hours you would agree to. Here’s the shorthand of what I need done. Integrate the ability to charge client’s encrypted credit card information through Stripe Customer IDs onto my Wordpress site so that I can charge my client at a later date. Here's a video on how this can be completed: [login to view URL]