I do not know anything about that species. But gut feeling is that it looks very promising - looks like a species that does not hesitate to send out roots.
Still, the safe play is to get an intact root ball, if you can.
I have been successful rooting big cuttings from the one I have growing on a fence in my yard.
I use pure perlite for cuttings and it works best for me it is sterile and holds a lot of moisture.
I took the pictures today. Late Winter early Spring is when I take cuttings and put them in sifted perlite, outside and out of the wind. I water my cuttings every day with my Bonsai when it gets warmer. I have found that if you use liquid fertilizer on them after they leaf out they make roots quickly.Nice! What time of year are you making those giant cuttings? That looks like a winter photograph?
I took the pictures today. Late Winter early Spring is when I take cuttings and put them in sifted perlite, outside and out of the wind. I water my cuttings every day with my Bonsai when it gets warmer. I have found that if you use liquid fertilizer on them after they leaf out they make roots quickly.