The Real Cost Of Building A 6-Bedroom Duplex

Hello guys, I will be starting my house today and wants to use this thread to  track all my expenses. I dont know how much it will cost for the entire house but I will try to update this thread as often as time allow me. I want to know the total cost of building my house and get suggestions, advice from other experienced people. First, I will reveal that I know a lot about buildings and will monitor this project myself. I will visit the site daily since I work in the area. I will source for materials myself, but my engineer will supervise the actual construction when it starts. This house is being built in Enugu and I already have the land fenced with gate. The site is cleared. I will upload the building plans when  I collect it. Its a six bedroom affair with five ensuit, two on the floor and four upstairs. I will be uploading the house pictures as we build, I think this will be fun.

Yesterday, I paid 20 thousand naira for the house plans, the young man promised to deliver the plans within ten days, meanwhile I want to begin making blocks myself, instead of buying. Today, I paid for 5 trips of sharp sand for the initial blocks to be made. I also paid for 40 bags of cement @ 1800 per bag. (I know its costly, cement is scarce now in this area) plus 2k for transportation. I have arranged for water with 3 thousand naira. Tomorrow morning, the block making will start. I target to get 1400 pcs. 6" solid blocks after the first block making work, will make more blocks later. Current expenses= cement N72000 house plans N20000 cement transport N2000 Water N3000 sharp sand (5 trips x N6000) N30000 Total present cost = N 127000.00

I forgot to mention the cement loaders charged N800 to load and offload the cement. N20 per bag. Total current expenses = N127,800.00