Weird situation with SIL.. Thoughts?

So my moms boyfriends daughter, She currently has 4 daughters ranging from 1-9, all with different dads(most of whom aren't in the picture)

She has recently announced that she got engaged..To some guy who lives in Africa that she's never met him in person, only talked to him online.

She was set up with him by her landlord who is apparently his uncle(or related to him in some way). They say he's eventually going to be moving here to Canada(this guy she's engaged to) and that her landlord/his uncle is apparently going to be sponsoring him and helping him get his green card once he gets here.

This girl hasn't even met the guy she's supposedly going to marry and is apparently already going on about how "hes such a nice guy, and he wants to adopt the girls" ... How can you give permission to someone you don't even know to adopt your 4 daughters😒 anyways..

Here's the part I find most weird about the situation, her landlord is apparently going to be paying for her and all 4 of her daughters to fly over to Ghana for a trip. Why not just bring him here for a trip? Or why not her just go on the trip to meet him by herself, not risk something happening to her little girls, not to mention 1 tickets a lot cheaper than 5.. She would easily be able to find someone to look after them while she went.. Idk Maybe I'm just over thinking but something about the whole thing doesn't sit right with me.. She's in the middle of getting the girls passports ready right now..Really praying everything turns out okay. I'm not being crazy right?