@obiero,i agree with you that there will come a time when I won't need 3k to buy house items but it is far away,may be 1 year ahead as all I have is a 3inch mattress and 1 blanket.I need a meko,cooking utensils,buckets,a bed,chairs,iron,table,curtains,plates,cups,etc.The expenditure I can cut on later is clothes as I intend to buy 5 pairs of trousers at 600 bob each,8 shirts at 300 bob each,2 pairs of shoes at 1500 bob each,2 sweaters at 300 bob each,a suit at 3000 bob.This totals to 12k thus in 6 months I should be done with clothes and save the 2k in the initial budget meant for clothes.

Congratulations on your new job.

First you are starting off at a very good salary of 30k; i agree with you on most issues pointed out. My suggestions:
1. Read the book "The richest man in Babylon" it has valuable advice on how to budget and to save.
2. Save the 4k consistently every month-i would recommend buying shares religiously on 3-4 counters.
3. Give an allowance for your entertainment. ata kama ni kasoda on a Sunday shared with your girlfriend.
4. Two months down the line; you will get lots of pressure to change your lifestyle;-move to a SQ costing 7k, taking expensive lunches and snacks at work, instead of taking sodas with your girlfried, youll upgrade to eating Pizza and Nyamachoma.

Please don't lose focus! Have a goal you want to achieve which will help you maintain the focus.

Tie the knot next year!!?? hope she doesn't want a wedding.. otherwise....

Right now all I would say is
1. Track the small amounts.. maize on the road as you go home.. smokie here, a beer there!

2. Avoid the joneses..

3. SAVE! SAVE! SAVE! don't budget with 30K.
Toa ya Mungu (if you tithe),
Toa Savings(another 10%) and now plan again with what remains..
Develop a culture of saving now now;
Then get some entrepreneurial instincts as Njung'e advices.

Wish somebody had given me the same advice when I started working.
I'd have lived hata kama ni nyumba ya mabati..

3k? I highly doubt u will get a single room for that amount around cabanas area. rent for a single room is between 4.5k to 5.5k. Also in that area hakuna maji, so you have to budget for water. Fare uko sawa, i dont see you using more that 2400 on the higher side. Food, 100 daily, how will you manage that, assuming unakula 3 meals a day?

I started with 15k, but that was nearly a decade ago. You are on the right track bro.

Poor gal 2k per month.

Anaanika kwa jua kisha antafuna tafu-tafu!

poor dude, only one girl

Abit late though I guess still relevant, As soon as possible join a Sacco and have the 4k paid religiously every month. Make a mental note that your salo is 20.5k after sacco deduction and budget with that,to prevent the temptation of reducing the savings.
I like your idea of buying clothing and households soon, I wish I had done the same.(I avoided this to save everything to start a biz so I could make enough money to buy all that and remain rich but it's easier said than done but once you buy households they give u time to concretrate on bigger things.)
Most businesses(whatever size) require lots of time and other resources to get off the ground and alot of skill to sustain. Ain't discouraging you though, arm yourself with as much info as you need to start, sustain and benefit from a business if you will choose to go that way in future.
Meanwhile keep it as simple as possible(like u have narrated) until such a time that you have a strong foundation, for the journey ahead is a long one.
There is a theory that expenses increase to meet increased income so if you can avoid some of this temptation the better.
N just one more paraphrased statement from a man who was due to retire very rich,(for whomever it may be relevant,) we don't buy food, rent, fare etc when we get better salaries, saving should also be treated the same as one of those basic needs.)