Is 60 credits in 6 months reasonable?

[LevelUP]

For a competency based undergrad program, is 60 credits in 6 months possible?

Time without any reference means nothing.

Example #1

It took me 1 hour to walk 500 feet.  (1 mile is 5,000+ feet so then it would take me 10hrs to walk 1 mile?)
Well, you could sit down for most of the time, then you aren't getting anywhere while sitting.
The reality is it is possible to walk 1 mile in less than 30 min without breaking a sweat.

Example #2

It took me 2 years before I could speak Spanish.
How many hours did you study?  How many words do you know?  What is your definition of speaking?
The reality is it is possible to speak fluently in Spanish in just 20hrs learning around 200 words. 

Example #3

It took me 6 months to write a book.
How many pages is the book?  How fast do you type/write?  What type of book is it?  How much time involved?
The reality is an average person could write a 20-page simple book in a day.

For people that work a full-time job, family/friends and that go out some on the weekends they can still find 20 hours a week to commit to their studies.  Using 20 hours as a baseline, the slowest pace would be 1 course per week which is 72 credits worth of courses over a 6 month period for most people. 

Some of us completed courses in as little as 3hrs and some courses out there are hard that take 40+hrs.

I suggest starting at Sophia to get a feel for the online learning process.  They do have a free trial that unlocks the first lesson of every course + give you the pdf for the entire course.