I am living this right now, so ask any questions you may have.
I'm hosting two Chinese 16 year olds. They attend the Catholic high school that I attended, and it's 5 minutes from the school where I teach. I take them to school in the morning and bring them home in the evenings. Most everything else they take an uber for.
I provide them with food to make their own breakfasts and lunches and I make dinner most nights. Wednesday nights is "fend for yourself" but I always have plenty of leftovers or easy to make food that they like here. Ramen, frozen pizza, sandwich stuff tend to be their go to items. And frozen chicken strips and fries. Usually on the weekend one or two nights they go out with friends so I don't have to worry about their dinner.
They do their own laundry, I provide the soap. The electric bill has tripled. But I found out the heat going to their rooms is very inadequate so I allow them to use space heaters. I'm working on figuring out this issue.
The challenges: I'm an introvert. It's really hard for me to have people here all the time. Really hard. I rarely hang out in my family room alone anymore, I retreat to my room for a bit of space.
Sharing the kitchen is hard for me. Even when they try, they just don't clean things up to my expectations and I'm constantly talking myself out of being upset. I know they are not purposely doing things to upset me.
Lack of personal responsibility. Yesterday one of them left the house and didn't close the door behind him. It was literally open! I've talked to them about the house next door being broken into last week and tried to emphasize that their stuff is more expensive than mine and it's what will be stolen. They have very expensive electronics, shoes, gaming equipment, watches, etc... I can't tell you how many "false alarms" with the security system they've caused and how many times they forget to lock up.
They have a great deal of expendable income. I'm glad my son is 6. If he was also in high school I think it would be really difficult to see them constantly shopping and wearing expensive brands. We can't afford those things. Since he's 6, my son doesn't notice.
Chores are a real source of frustration. One student is great. He does what I ask when I ask, and if I need him to fix something done incorrectly he does. The other, not so much. It took me 6 weeks, and demonstrations using props, to get him to correctly take out the trash. Their jobs are to take out the kitchen and bathroom trash once a week on Sunday, and the other boy has to "ckean" their bathroom. It's really just a cursory wipe down. It's amazing how many times he can forget that I've asked him to do it.
The good: there is good, despite my frustrations. We've learned a lot about Chinese culture. I've added more Asian foods to the mix at home. My son is adopted from Korea and I liked the idea of bringing in Asian role models to our home. We've had some interesting conversations too, about cultural differences and expectations.
I receive a stipend every month. It more than covers their food and increased utilities. It's allowing me, a single mom, to pay my mortgage and take my son to WDW for spring break. My Chinese students will be traveling at the time. Honestly, the stipend is what keeps me going. I'm hoping to do this next school year as well and then reevaluate.
It works for me also because these guys are very independent. They like to do their own thing. I've invited them to family events, some parties, etc but they decline and I'm okay with that. I had imagined we would do more outings all together and that's not the way it's worked out. I know my son wishes they would interact more with him. He asks them to play uno, watch sports with us, etc... and they prefer not to.
I think our house set up also leads them to be more independent and the good and bad goes with that. It's a trilevel, with their half bath, (they come upstairs to shower in a full bath), laundry, garage, family room, office, and their 2 rooms on the lower level. On the main level is the kitchen, dining, and formal living. The top floor is the full bath, my son's room, and my room with my full bath. My son uses my bathroom now most of the time. If I'm going to keep doing this, I'd like to add a shower downstairs. It's nice that when they stay up late or are gaming or skyping I don't have to worry about their volume bothering us upstairs or keeping us from sleeping.
One tip-I wrote out a sheet of "what you need to know" with info about wifi, chores, meals, etc... and posted it in their rooms and the kitchen. When they first moved in, it was really helpful to go over and make sure we were on the same page about things. It's also been a good reference to go back to.
Good luck OP! Sorry for the novel. If you have any questions I can help with, just ask!