Yes, there will be a lot of gaming.
Yes.
1. Probably change of plan, Carbon is unavailable in my country, I can order it from another country but I think that colleague won`t like that. Also budget is on the limit. I think he will buy Asrock B350 pro 4, seems like a stable mbo. Will it eventually hold 8c ryzen in future without any big problems?
2. Probably this one: Patriot V Elite DDR4, 2666Mhz, (2x 4GB),8GB, CL16
3. Since 1050Ti is faster some25% I think it is the better option. Some medium settings in AAA games.
6. Is WD green faster than Kingston HyperX Fury (I have that, satisfied 100%)? To fit the budget he will buy 1 ssd 120gb and 1TB WD blue (10ezex). I can`t find any MX300 of 120gb. Strange