Tennessee Temple University (TTU) has what may be the least expensive nationally accredited PhD (Doctor of Philosophy) program. It is a PhD in Leadership and is mostly online. Tuition is 250 per credit hour. TTU is nationally accredited by TRACS and it has a bricks and mortar campus. Tennessee Temple University Does require a total of 15 days on campus. At the risk of invoking Aspen again, if you do not mind an EdD instead of a PhD, TTU does not come close to Aspen's tuition rate (though in the scheme of things is not that much more expensive). When I last looked at Aspen's web site they have extended their tuition break until Nov. You pay more for the TTU PhD but it is a PhD, and for those to whom it matters it is earned from a bricks and mortar university. Some advocate campus interaction with faculty and students as beneficial. I suppose there are differing schools of thought on the issue. TTU is an inexpensive option from a nationally accredited bricks and mortar school.