For comparison on pricing, their lowest tier unit is 24kbtu and costs $10k.

I bought an LG split with 4 ceiling-mounted heat exchangers, one of them 18K BTU, and 3 of them 9K BTU, all of the plumbing and distribution box to connect them, and the outside 48K BTU exchanger, and the total shipped price including sales tax was $7,200.

The advantage of having 4 independent indoor units is the key, as you don't have to heat the entire house 24/7 and can save energy by only heating/cooling the appropriate zones. I don't see even any option or pricing for them to use 4 indoor units on their website.