Have you guys checked the website for thika greens of late. Based on what is on the ground i am now convinced these is a serious project by professionals. For those who were talking of PK you'll now be able to see the directors (pictures) plus you can interact with them if you like.
www.thika-greens.co.keHowever, it seems this project will take quite sometime before its complete (min.7 years), if one is thinking of a retirement home, then you can start early and by then you will be in an equivalent of muthaiga ie. phase 2 & 3.