How can I make ‘available’ quote with different info, for different property. I see it under Preview. But I don’t see anything for selecting property.
You mean the email template? What sorts of things do you want to change? If it's something like property name, you can put in a merge field. If you want it to be totally different, you've got two options...
1) Set up property custom fields and put in the language that is different per property, then insert those fields into the standard quote template. That way it'll auto populate when you go to send the quote.
2) Set up a new template and switch to it when sending out a quote. It'll start with the default one but you can switch to any other custom quote template