Need advice to get either 30 credits and be registered at a school or 60

[suzycupcake]

Hello friends!

Asking for a friend who wants to substitute teach and currently has no college credits at all. The rules to get a substitute certificate:
a.) 30 credits and be registered at a university
b.) 60 credits

Originally was thinking that they go the Associates Route but then thought that left less room for classes that interested them since a BALS may have more flexibility for electives. I don't know if these credits would ever turn into a degree because from what I'm being told they only want/need the credits to get the sub cert. (I will throw in there that this person was a police officer for 20 years and they may change their mind and want a CJ degree after all, who knows for sure.)

My original thought was to take Sophia/Study/Straighterline courses up until 30 credits and then schedule a TECEP at TESU which used to enroll you for a year. Is that still the case?  Each year they could enroll for another TECEP to stay registered?  

Is that the best idea?  Does anyone else have any ideas?

Thanks in advance - my head is spinning and I can't get out of it.  And of course, they want the cheapest possible way to do this.