Nano degree

Just no. So some interesting prpkects and document that. This will give your more credibility than an online mini degree when people you are up against probably are still in debt from their real in person degrees

Do the $299/month one. It's free if they don't get you a job. I'd say go for it, you'll have a structured curriculum and I think you get 50% back if you do the $199/month one and complete within a certain timeframe. So for $600 (complete in 6 months - 50% back) that's a lot of course content with structure.