@Anika66,
I am simply shoked by the levels of your worry over things that are not in your control. For example, you should look at the proffesional side of things as far as the Longonot gate project is concerned - more than the Kenyatta family involvement in it or their ownership. To set you free, this project is owned by One Lee Karuri and family, he of Dimensions architecs.Purely Proffesional and worthy Investing in.
Being a first time real estate invester, My take is that this is the wrong destination for you. If I were you, I would simply invest in (several)cheaper land as far as you follow due diligence. Juja farm, Murera/Ruiru, Kamulu, Ruai,Kajiado, Magadi road, Isinya, Kitengela, Greater eastern and other Bypasses etc will be beneficial in the short/long term than spend 4 million in a single 1/4 acre plot.
Go to Longonot and I can assure you that you'll reap at 78 years if lucky! Contact me if you need referals
Do not be anxious about anything, but in everything, by prayer and petition, with thanksgiving, present your requests to God..