Hello,

Most of the times you will print in PLA, so 50?C is not a danger temperature.
I am agree with Linias, i heard lot of good things about ENDER 3 printer, it has lot of good reviews in internet, check it.
I think is a good option for start to learn, and if later you need something more proffesional you can check more detailed.

Best regards!
http://www.3d-work.es