You are on the right track! The path to economic freedom is reduction of expenses - especially recurrent expenditure, and increase in investments. If you are comfortable where you live and you and your family are relatively safe - as safe as one can be in Kenya - then live your life! Rent is not an investment. The less you spend the better!
And the good news is, even if you were to experience economic shocks, your family will not feel it. And that is HUGE in terms of you and your family's emotional well being! There are fellows who get laid off or lose one contract and the following week they are moving houses and transferring their kids to cheaper schools. That hits the kids - and even parents - hard! It's never easy to go down the social/economic ladder! The guys you get 'down there' are totally comfortable and you and your family think it is the end of the world!
Save your money, invest and ultimately move to your dream home as a home owner not tenant!!
Never count on making a good sale. Have the purchase price be so attractive that even a mediocre sale gives good returns.