If you are looking for a furnished apartment ksh.30,000 would be too little.But if you will furnish it yourself then let me know and state the location where you want to reside.
I have a studio available in kilimani . the rent is kshs 45,000/- all furnished. Alternative accomodation in westlands -shared accomodation for kshs 35,000/-
If you are in Kenya you can contact me we check out the rooms.