As far as in Brazil it would be hard to find safe place - you can be sure this one fits for those requirements. I were staying at Stalimir place for some time and it was totally perfect.
Well equipped flat , including loads of sleeping places , good(!) shower, fully equipped kitchen and air condition. Host was very friendly, easy to communicate and really motivated to speak English (this is very rare in Brazil!)
Area is safe for going out , don't be aware to be robbed. House is secured with a concierge,cameras and all Brazilian types of defense :)
You can find shopping area near by. Internet was also pretty good.
Recommended
Россияне - не бойтесь, хороший местяк за свои деньги!