How do you handle recurring retainer payments and invoicing with Stripe, and what tools do you use for proposals and sales workflow?

For recurring retainer payments, I rely on Stripe’s built‑in subscription/invoicing feature: create a customer, attach a recurring product to an invoice, and send it. I don’t need a fancy automated system—manually putting together an invoice takes about 30 seconds and is worth it. For the sales workflow, I use a simple form during calls to capture the customer’s name, email, phone, business, and problem details. That form triggers a make.com workflow that feeds the data into AI, which populates a proposal template on platforms like Panadoc, Better Proposals, or Quiller. Panadoc is handy because it includes payment integration that handles Stripe, though its API cost is high ($2 per document). The overall process is: sales call → form → make.com → AI‑filled proposal → send to client. You don’t need to build a custom widget or workflow; the existing tools are sufficient.