Fast and affordable parth to a Bachelors degree in IT for an International student

[cr22424]

Hello everyone.
I am Chris Roberts and I currently live and work in Nigeria. I wish to advance in my career and I want to take the fastest (15 months or less ) and most affordable (Maybe less than $3000) route to a BSc in Computer science or a related field.

I had my eye on SMC university, but the lack of accreditation is a concern for me. 
I like UoPeople but it takes 4 years to complete a degree.

Thanks to you guys I now know it is possible to get up to 90 credits from Saylor, study.com etc. and transfer to a BSc Program.
My question is how do I know which courses to take and which platform to use.

Pls I have no idea what CLEP/DSST/ECE means. Not just the acronyms but how they affect my journey to a BSc.

I have learned a lot from reading through posts on this forum, and it's possible the information I'm looking for is already out there, but because I am not from the US a lot of the information is a bit confusing to me. PLEASE HELP!

SUMMARY: I want a fast and affordable parth to a BSc in 15 months or less, costs $3k or less for an International student.