Hindi pa naman umaabot ng 15 ang sa amin, but I'm praying huwag naman! Hirap kaya.... here's my situation:
In my case, I had a Yaya who stayed with us for more than 10 years (13 years to be exact), but she left kasi nag-asawa, then, here comes the dilema...
Batch 1 - who's looking after my 2 kids plus luto/linis
Yaya #1 (13 years) - nag asawa na
Yaya #2 (6 months) - nag paalam, mag bi-business daw sila ng asawa niya... then I discovered lumipat sa iba
Yaya #3 (5 months & 2 weeks) - left w/o paalam. sumama daw sa BF niyang "tibo"
Yaya #4 (2 months & 2 weeks) - left w/o paalam. nag hanap daw ng mas masmalaki ang sweldo (she was previously an overseas worker/maid)
Yaya #5 - currently on her 2nd week pa lang... but heard rumors that she will not stay long. Up to end of the month lang daw! Waaah....

Batch 2 - who's looking after bunso, plus laba/linis
Yaya #1 (2 months) - hiram lang
Yaya #2 (3 months) - bumalik ng province, kasi di siya sanay sa hindi "compound" ang location
Yaya #3 (2 years) - sumama sa BF at nag live-in
Yaya #4 (1 year & 1 month) - nag abroad
Yaya #5 (2 weeks) - left w/o paalam. nag deduct daw kasi ako ng "holding fee" sa sweldo niya
Yaya #6 - still looking

I'm now thinking, is there something wrong with the set-up or with the kids, or is it with us? Kaya di na tumatgal sa amin ang mga maid/yaya? Kawawa nga mga kids sa mga ganung situation, mag-aadjust sila ng mag-aadjust every time.