Poultry Farm Web Management Software

I run a poultry business that sells chicken by kilogram and I need a web-based application to streamline my daily operations. The core flow is simple: I select or add a customer, record whether the sale is cash or credit, generate the invoice, and the customer instantly receives an SMS with the bill amount, the amount paid, and any balance. From there I need to see, at a glance, how sales are performing each week, month, and year, plus which customers still owe me money.

Key functions I must see working end-to-end
• Customer management storing at least name and contact number (an address field would be useful but is not essential).
• Sales and invoicing for both cash and credit transactions.
• Automated SMS dispatch triggered the moment an invoice is created.
• Two report types: sales performance and outstanding dues, with date filters that let me pull weekly, monthly, or yearly numbers.
• A clean, intuitive interface so staff can learn it in minutes.
• Optional but appreciated: one-click export of any report to Excel or PDF.

Deliverables will be accepted when I can:
1. Add, edit, and search customers from any modern browser.
2. Complete a full sale (cash or credit) and watch the SMS arrive on my own phone with the exact bill details.
3. Pull a sales or dues report for a custom date range and, if I choose, export it successfully.
4. See data persist after page refresh and user logout.

Please outline:
• Your technical stack and why it fits a lightweight, web-based deployment.
• Timeframe in clear phases (development, testing, hand-over).
• Fixed or milestone-based cost.
• One or two similar projects you have shipped, especially if they involved SMS or invoicing.

I look forward to your proposal and to getting this solution live soon.