Hi Gary,
Thank you for writing in, I don’t see that Mixed Content issue with your custom font. What I am seeing is for these images.
http://s3-us-west-1.amazonaws.com/buildrealty-image-uploads/wp-content/uploads/2016/02/29224530/bg1.jpg
http://s3-us-west-1.amazonaws.com/buildrealty-image-uploads/wp-content/uploads/2018/09/09130217/Contractors-bg.jpg
http://s3-us-west-1.amazonaws.com/buildrealty-image-uploads/wp-content/uploads/2014/11/07154429/sell-bg2.jpg
http://www.houzz.com/res/2031/pic/badge181_25.png?v=2031
I see that your site is under CloudFlare, please log in to your CloudFlare’s account dashboard and purge all caching.
CloudFlare Support - How do I purge my cache?
If purging cache does not work, please re-set (remove and add back) those Images I linked above.
Let us know how it goes,
Cheers!