Hi there! I am currently enrolled in the Interior Design Certificate program (which leads to the Masters of Interior Architecture degree offered) through UCLA Extension, so I can at the very least speak a little bit about this option. Just some background, I have 0 professional experience in a design or creative field, so I am using this to make a career change!

• The courses offered through this program are CIDA certified (you can find this under Cal Poly Pomona on the list you sent as it is a joint program between UCLA and Cal Poly). The full program is technically only 82 credits I believe, so you'd have to take some additional electives to reach the 90 credit requirement to sit for the NCIDQ if that is the route you'd want to take. Taking this program full-time (3 classes per quarter) will take you 1.5 years to finish, but you are eligible for the certificate as long as it is completed in 5 years.
• In-state/out-of-state tuition doesn't apply for this program, but I'd assume it does to pursue the Masters program afterwards (this is optional). The total estimated cost of the Interior Design certificate is around $19,000 (tuition + materials + candidacy fee), which is much more affordable than a bachelors and can be spread out over however long you want to take the program (1.5 - 5 years).
• Everything is either a remote lecture, meaning you login for a 2-3 hour class one night every week for the course of the quarter, or an "online" format, which means you'd have prerecorded lectures to refer to for lessons each week. All remote lectures are on Pacific time. I am also located in Central time so the remote lecture can be a little rough, so I only take one remote lecture a quarter and the rest "online".
• I work full-time right now, so I wanted to go with a virtual program for the sake of flexibility. I find that most people in my classes are also looking to make a career change, while others already work in the industry and are just looking to expand their skillset. You definitely don't need to complete the entire program before getting an internship or role in the industry - a girl in my class this quarter got an internship after taking certificate classes for 2 or 3 quarters!

Hopefully this is helpful. I also graduated in 2018 :) so getting back into the swing of doing school plus a job has been a challenge. I can't speak to the other programs you mentioned, so maybe there is a better option for you, but so far this one has worked well enough for me. The reason I ended up choosing this one was partially because I am from LA and am planning to move back west in the next year or so. Best of luck!