South Dakota - Graduate Offerings - $22K DNP/PhD

I was searching for institutions in South Dakota and they only have two research universities!
University of South Dakota has several undergraduate/graduate online offerings
Online Programs Link: https://www.usd.edu/usd-online/online-programs

Online Doctor of Philosophy in Health Sciences - Minimum of 75 credits beyond the baccalaureate degree
A maximum of 30 credits from a completed master’s degree or professional doctorate earned at a
regionally accredited U.S. institution or a recognized degree-granting international institution

A PhD in Health Sciences at the least will cost you roughly 45 x $470.45 = $21,170.25 USD
This program is geared towards professionals already working in the Health sector (including Allied Health)
Review link for Health Science professions: https://www.usd.edu/usd-online/online-programs/doctor-of-philosophy-in-health-sciences/advisors

Online Tuition Link: https://www.usd.edu/usd-online/tuition-rates
Undergraduate.......................$354.75 per credit hour
Graduate................................$470.45 per credit hour

The other research based institution is South Dakota State University
This university also has several interesting undergraduate/graduate online degrees
Online Programs Link: https://www.sdstate.edu/continuing-distance-education/online-programs
Examples of interesting ones are the BSMLS for Medical Lab Technologists and the Masters in Dietetics, Engineering (M.Eng)

South Dakota State has two online Nursing Doctorates - DNP & PhD with different pathways of entry to each.
Individuals who are nurses and wanting to move up the Healthcare chain or ladder, this might be an ideal alternative
Tuition is identical to USD above for these programs, it's interesting too that there are tuition discounts
You can review the tuition here: https://www.sdstate.edu/tuition-and-fees