Hi,
Your site speed will largely depend on your host, we use and highly recommend WPEngine. You should also use a CDN to serve your content faster to your users, we recommend MaxCDN.
I would also not recommend you use a Lazy Load plugin, these can interfere with JS libraries such as Isotope which is used for filtering and creating complex masonry layouts.
I can see a JS error on your site, this relates to FontDeck, have you manually inserted any code for this or modified the theme files?
– There is a theme update also available: http://www.awesomeendsin.me/wp-admin/themes.php?theme=neighborhood
Thanks,
David.