Hi, I'm Usama!
I have my full time job as a civil engineer . I've been in this part time business , renting out my apartment/s , for more than 7 years .
And now , i own two apartments and manage my sister's. When you are honest and your rates are reasonable you should expect to expand. :)
I use to do this out of fun and i guess this was the key of success .My customers are my guests and friends not just tenants and numbers , I do like to help them with planning their tours . It is fun .
Cairo is amazing with someone who knows where to go . It might take you months till you get bored or start repeating places
It is not only attractions you should visit , there are places for Egyptian / African music , dances , a walk by the nile , sitting in an oriental cafe and smoking Shisha . I do recommend to extend your visit to the max otherwise you'll regret it :)
Forgot to tell you that by years i knew lots of Car drivers , professional guides (Egyptology) in different languages , travel agencies and even sellers in souvenir shops which is all put on table for the help of my tenants if they need any assistance .