I don't know whether this has already been mentioned, as I don't have time to read nearly 1000 posts, but NO-ONE would bat an eyelid if it were a MAN who wanted to do this.
Ignore the haterz and grab this opportunity. People slating you are very likely jealous, and bitter that they never had the same chances. (Or even worse, DID have the same chances, but were too chicken shit scared to take them!)
Yep, in 40 pages nobody has once mentioned that if a MAN did this, nobody would bat an eyelid 🙄And that the actual lawyers advising caution are just well jel🙄FWIW, I do know men who have turned down extended travel that would have taken them away from their families, even though that travel would have had real and tangible career benefits for them.
Nobody has actually addressed the issue as to whether flying home eow would hurt the OP's studies. It seems to me, to take this opportunity the OP has one of three choices:
A) To take full advantage of the opportunity afforded by the placement, spending time exploring her surroundings and meeting new people, but also flying back every other weekend to spend quality time with her young daughters. However, when does she have time to devote to her studies? Law is hard. Reading case law on a plane isn't going to cut it, I don't think. So the risk is that she ends up with a lower grade than she would do otherwise.
B) To plan her time meticulously so she spends every spare moment during the week studying, freeing up time to go home every other weekend. At which point the OP won't have time to see many of the sights or absorb much of the culture, and any benefits of her being in another country become extremely marginal.
C) To forego the fortnightly travel and perhaps return only once during her time away. But now you're talking about leaving a four-year-old and a seven-year-old for extended periods of time for an opportunity which, on balance, is unlikely to have a significant impact on OP's career prospects and surely can't be in the children's best interests. (Although, yeah, I don't have a crystal ball. Maybe there's a recruiter at the sister university who's on the lookout for mature students to hire into a Magic Circle law firm. I don't know.)
Alternatively, OP could recognise that this particular opportunity is primarily aimed at childfree students in their early 20s.
Instead she could take option D), which is to realise that she would love to spend some time abroad and then seek out opportunities that would actually benefit her career and tie in better with family commitments. For example, a sabbatical during the summer holidays. A work placement when her weekends are free from studying. A secondment with a chance for her kids to go too. Who knows?
Finally, I don't get the posters who are saying "you already spend half the week away from your kids, so it won't matter if you spend more time away from them". Isn't it the other way round? She already spends half the week away from her children - surely it would be better for the young children (one only four-years-old) to see more of their mother, not less?