Wakameat thanks for the advice. But to make this thread more informative, it needs to be clear. I suggest you take your time and post everything at once. However long it may be, wenye haja kama sisi tutasoma. Posting bits and pieces of information in the replies makes it difficult to follow.
you are making sense on the ground type (cotton vs red soil) but from my general observation, land only, on red soil is the equivalent of a built house on cotton soil. Case in point ; compare plots in Red hill, Tigoni, Kiambu Road, Ruaka etc . None costs less than Ks 7 M, while finished houses on Mombasa road are available from as little as 5 M for bungalows and 7M for maisonettes.
@ okiya,ukitaka kufanya shattering without using timber and poles,unaweza tumia free span technology,unaenda kwa clay works unanunua hollow bricks zile zitatosha nyumba yako,huwa zinapasuliwa juu unazizikanisha unaweka chuma mbili ndani unakorogea na ile kokoto ndogo 'mchele' zinaform a beam,utakuwa unaziuda kulingana na urefu wa rooms,kwa hivyo kama huna nafasi nje unaziudia ndani,una weza ziuda at your own pace ,after kumaliza zote kama umeziuda once unangojea 21 days zikauke,saa hizo umekoroga ring beam na imekauka,unaita wanaume wamekula kuzipandisha juu,unawekelea brc juu yake halafu unakoroga ile mchele kokoto ya 2 inches,the best thing for using this method unaweza korogea at your own pace bora umenunua bricks