Office LAN design using Common Sense and expenses

In the past I always wonder how lan is designed.

but recently got chance to put lan setup in office.

We moved to quite big place with around 25 people sitting capacity.

I first thought to put 24 connectors

2 * 8 port switch- Rs.1900 (950*2)
1 24 port switch - Rs. 3800
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wall jacks - 250* 24

labour - 300 per jack

we used Cat 6 cable instead of Cat-5 cable (still need to figure out difference)
Cat 6 100mtr cable - Rs. 2800
Cat 5 100mtr cable - Rs. 1900

Our electrician was not available so We called some electrician to do wiring work but he asked 3500. We tried to negotiate with him to take 2700 for work but he didnt want to negotiate. so we fell back to our trusted guy. He did whole work in just Rs. 1700

so It was going out of budget as we are only 8 people team so I reduced total jacks to 10 and cost got reduced accordingly.

Total cost was Rs. 11000 (including labour and material cost to setup lan with 10 pcs)

here comes interesting part lan designing, please refer to lan diagram attached.

Office has 2 floors, Basement and ground floor. Challenge was to keep everyone on single LAN also provide additional lan for ground floor.