Just a FYI: I bought a Pocket PC from Amazon.com for $135 (lightning sale - 20% off). It comes with Windows 10 Pro pre-installed along with a copy of Windows 10 Pro and activation key (if you ask for it). You can find it at:
W5 Pro Mini PC Intel Atom Z8350 Windows 10 Computer Stick 4GB DDR 64GB eMMC Support 4K HD,Dual Band WiFi AC,BT 4.2
After an initial issue with error POL-0512, it is running like a champ - a slow champ, but it is functional. I wouldn't want to do any end-game stuff, but Mog Gardening, daily RoE quests, etc is working well for me (from what I can tell at this time). As for getting over the POL-0512 error, please, see the FFXIAH thread:
Brand new computer & POL/FFXI install - POL-051
I bought it so I could have 2 of my POL accounts on at the same time doing the daily RoE quests (e.g. 20 Buffs, 30 Heals, 5 Cure status, etc). Yes, my main system could run both POL accounts in FFXI window mode, but for $135 it was worth seeing if this would work. I'm going to do the daily RoE stuff using both my main and this Pocket PC.