Real estate website chatbot

I am thinking of creating ai chatbot for my real estate client. Chatbot features and functionalities :

1. ⁠lead generation
2. ⁠property recommendation with complex filters
3. ⁠appointment scheduling

In my tool research I came access various platforms like voiceflow, langflow Also some automation and ai agents like n8n , make etc

I am confused which to choose and from where to start. Also my client is using WhatsApp bot then can ai chatbot really help client or is it waste of time and money?

Can somebody help me by sharing their experience and thoughts on this.