this is not easy task (ask NASA Mars exploration site
Rover Sojourner) really mean serious.
This robot must be also independent when is out the reach remote control.
But for distance operation (when you cannot see robot) you need two way rf communication. If you can forget GSM network (I know Macedonia and know terrain also trouble with communication on RF), forget also OSCAR satellite, people tell you good, OSCAR are NOT geostationary satellite , for short communication need too complex antenna on booth side, control and robot too. not possible and yes valid license need(from Macedonian government of course) to use OSCAR , theoretic Geostationary satellite are possible, but first this is too much distance between Geostationary satellite and robot second, to use up link and very limited bandwidth on Transponder Geostationary satellite not free of charge, it is too much expensive for common people. Only using own relay station can be possible but cost and too much trouble. If you see NASA page , MERV-A and MERV-B have orbiter satellites but not in stationary orbit around Mars , rater in low orbit.
So make a robot long distance RF controlled look like hard task.
P.S. I give link to first one Mars robot almost like toy but this "toy" 11 kg weight(
Description of the Rover Sojourner )are very expensive. MERV have almost same principle but they a bigger(180 kg ) , have direct RF communication to Earth control.But autonomous moving are taken from Russian Lunokhod(few hundred kilograms).
No joke, mean serious.
Sorry for my bad English.
Try replica of Sojourner or FIDO small or large (experimental project
Cornell News: Students drive Mars rover)