I only share what I know and won't speculate on what I don't. For all your 3 questions, I can't give you any firm answer.
Out of the 3 units I've mentioned earlier, one of them belongs to myself, that's why now I know for sure that such rent is real. I didn't state the exact figure and didn't mention that one of the units is mine because I've shared info with my neighbours in person. If I reveal too much, I risk exposing my online identity. This is not a totally faceless forum, I know 3 members here in real person and we share info regularly after becoming friends. One other member here rented out his EL semi-d at RM8k(partly furnished) many months ago. I have met his ang-mo tenant and confirmed his rent and it's true. To be frank, I think RM8k is a really low rent when resale price of a semi-d is now at RM2.4-RM2.5mil. I know of 1 partly-furnished semi-d being rented out at RM15k but just like what Reds had mentioned, this is just the 'outlier'. The rest of us are not as lucky as that landlord.