Doctorate/PhD in Software Engineering/CS? (US or EU)

[impasta]

Well, I returned to this forum to help my fiancé plan his Bachelors degree, but after reading all these posts I'm starting to feel tempted to go back to school myself.... You guys are the worst   

Any suggestions for an affordable online Doctorate or PhD in Software Development/Software Engineering/Computer Science or related field? I'm a US resident (Texas) and would prefer a regionally-accredited US college. However, I actually have dual citizenship (US and Austria) so I'm wondering if there might be some cheap distance learning options within the EU for me, as long as the degree would still be recognized here in the US. Since I currently work as a Software Engineer it would have to be a part-time program. I am interested in potentially teaching Software Engineering or Computer Science at an online college in the future. A PhD would certainly come in handy there. 

I did search the forum and so far the most promising option seems to be Mississippi State https://www.online.msstate.edu/phcse , but I'm still looking... I appreciate any ideas and insights! 

Thank you guys.