Monitor advice needed: 2018 Mac Mini + BM eGPU Pro

I'm purchasing a 2018 Mac Mini (3.2GHz 6-core Intel Core i7) and the BM eGPU Pro. I currently use a Samsung 4k monitor with my MBP, but I'm going to soon buy an LG Ultra Fine Display (4k or 5k) and give my current monitor to my daughter. Although I'll start with one LG monitor, I would like to eventually get a second. Can any one tell me which configuration(s) below can be supported by a 2018 Mac Mini with a single BM eGPU Pro?
Option 1: 2x LG Ultra Fine 5k
Option 2: 2x LG Ultra Fine 4k
Option 3: 1x LG Ultra Fine 5k
Thanks, Steven Hendricks