Trulia did something very similar to Bills.com with their landing page. It starts with a simple form asking for "an address" (which sounds less creepy than "your address," although that's what they mean). Below this simple form field is a bright orange button that contrasts well with the hero image behind the form, and emphasizes that the estimate will be personalized to your home.
There’s a better solution: It's not impossible with sales funnel management automation. Set up your system with the response you want, and it will be ready to send it immediately to any interested prospect—even the one who contacts you on Saturday at 3 am. As captured leads pass down the funnel, your sales automation platform can send added personalized emails that are just right for each moment.