MARS is an affordable overnight for three in New Belgrade, near Zemun.
It is a modest space (a bit over 20 square meters of floor area), on teh ground floor of a New Belgradian apartment building. At best, MARS can accommodate three people. Two can share the double bed whereas one can take the small fold out armchair. The whole width of teh apartment is windowed, so if you wish, plenty of daylight can come into the apartment. The furniture is a mixture of old and new and is of fairly satisfactory quality.
Nested in the anonymity of commieblocks, MARS is one of the very few apartments in the vicinity of Mother and Child Institute (it will take less than 8 minutes on foot to get to it). There is plenty of parking space around the building and it is free of charge, but even if you don't arrive by car the connection to other parts of town is ensured via public transport. All in all, if you were seeking a cheap overnight in New Belgrade, MARS fits the description perfectly.