never marry an older sister, she will be responsible for her siblings forever, and the #1 in line to care for her aging parents
this means you will be shouldering that responsibility when the time comes
if you can find a girl with dead parents and no siblings that would be the best, since she is indebted and enslaved by nobody
never marry a single mother, her loyalty will always be to her first child
avoid dating a single mother also, because everything she does is due to taking care of her child
If you absolutely need to be with a chick with a big family and siblings, make it crystal clear before getting heavily involved that you will be sending them zero dollars, forever. You are already doing them a big enough favor by caring for their daughter and taking her off their hands. You owe them nothing. Ever. Forever. Don't ask period. (they will anyways, but this way you can claim you told them no).
Do not marry a nurse or college educated filipina. They are poisoned by feminism and academia. The sweet spot is office work but not highly educated, so she has modern life skills but not a chip on her shoulder.
Do not marry anyone who has done 'overseas work'. They have been exposed to the outside world and may have been abused in many different horrible ways they will never tell you about till they have a meltdown.
Verify she wasn't married first. There isn't divorce in the Philippines still, so lots of young women are 'separated' but married still, legally. This is a massive headache.
Verify she has no children before you marry her. 'Surprise! I have a child in the province' is a common-enough gotcha that you should do a public records search for any children born to women with her name.