What have you been doing with the 1099-MISC?  Paying tax on all of it?  Because the expenses would not be deductible on Schedule A.  At least with a 1099-NEC, you can use Schedule C, although it's not really a trade or business.

Or is it? One online source says the "stipend" can be $1,000 a month.  Hungry teens can eat you out of house and home, at least from some northern European countries, but what if you host an Asian vegetarian?