Hello,
I hope this is the right place. Firstly I have a 12 core Xeon with 24GB RAM that should be able to handle your demo website.
If interested contact me ( matias at pizarro dot net )
secondly, 2 leftover {% admin_static_url %}img/admin/ urls that I reckon should be changed
in templates/admin/cms/page/change_form.html:
l.39
background:#fff url('{% admin_static_url %}img/admin/nav-bg.gif') repeat-x center bottom !important;
should be
background:#fff url('{% admin_static_url %}img/nav-bg.gif') repeat-x center bottom !important;
and l. 48
background:#7ca0c7 url('{% admin_static_url %}img/admin/default-bg.gif') repeat-x left top;
should be
background:#7ca0c7 url('{% admin_static_url %}img/default-bg.gif') repeat-x left top;
all the best