Bringing a maid from your side (not through office)
25 QR/hr x 5 hr/day = 125 QR/day
125 QR/day x 5 day/week = 625 QR/week
625 QR/week x 4 week/month = 2500 QR/month
2500 QR/month x 12 month/yr = 30000 QR/yr
By the end of the second year you will pay another 30000 QR, so in two yrs you would have spent sixty thousand Qatari Ryal

Through office
Charges + visa = 9000 QR maximum
1500 QR/month salary = 18000
Total is 27000 QR in frist year

Now if we see the difference after two years
Maid from office 45000 QR
Maid through you 60000 QR
from office you save 15000 QR in the first two years