Integrate WhatsApp SaaS into GoHighLevel

I need to integrate two WhatsApp SaaS platforms into my GoHighLevel (GHL) white-label CRM. My goal is to allow all my customers and sub-accounts to access and use these features directly within their GHL accounts.

Required Features:
- Bulk Messaging
- Automated Campaigns
- Chatbots

Integration Requirements:
- Users should authenticate via username and password.
- Need to access APIs or SDKs for both platforms.

Please provide:
- Best integration approach
- Estimated timeline and cost
- Any technical limitations or dependencies

Ideal Skills and Experience:
- Proficiency in API integrations
- Experience with GoHighLevel and WhatsApp SaaS platforms
- Strong background in CRM development and customization

Let me know if you need access to code or documentation for either platform.