I took it upon myself to check out some AMD cards and see how they compared to NVIDIA cards due to the fact that they were the only cards you could find mid January 2018.  I had heard the hash rates were similar to 1050ti cards yet a smaller power draw.  If that's correct you could save a ton by getting 550's instead of the 1050's.  The 1050ti cards were going for $200 to $250 while the 550 was hovering around $139.   About the only difference is that the 550 has 4Gb RAM and the 1050ti