My MIL is a housewife and hasn't worked in 25 years but was trained as an accountant; my FIL is an accountant working for a large Chinese conglomerate. Both are good English speakers. He's a fluent Mandarin speaker as well; my MIL speaks Cantonese. We have a massive Chinatown here and I'm assuming they could get relatively low-level work in a grocery store or similar in short order, We've talked about him building out a small bookkeeping business in the Chinese community upon arrival. The hope would be for them to live with us in the 3BR and that they would move out when they could buy a little 1BR for themselves in cash. Multigenerational living is the norm in the community, though it gets...cozy.
What would you do with the money they send? Put it in a taxable investment account? Bond fund? CD ladder? Savings account? They could come in 3 months or in 20 years, or they may never come at all, which is making it hard to strategize.
Both trained as accountants and one speaks Cantonese, the other Mandarin. Forget about stocking the shelves in a grocery. They can both get jobs as translators - either for the government, an American based global business, an international bank, an international law firm, an international accounting firm. Your FIL may even be able to continue his accounting career
There's an old saying that two women under the same roof may breed discontent. Of course, this reflects the Anglo-American culture. Maybe you will have better luck.
What to do with the money -- if only that were easy. While the first inclination would be to say "stocks", their arrival may coincide with a repeat of 2007-2009. Also, you can't send them anything to sign in case the wrong eyes see it. I would probably do some version of the 'Permanent Portfolio" (Fail Safe Investing by Harry Browne), except I would use the cash portion of it for the third bedroom.
For whatever can't be in all your names as co-owners, at least make them beneficiaries.