About a year and a half ago, this family I know in MD offered to let me live with them rent-free to help me with my financial situation. Things weren't so bad then, but I'm about to go back to America from Israel soon with only $350 or so to my name. I sent them an email asking if their offer to let me stay with them is still good, and if not, if they have any suggestions. This was about a day and a half ago, and I haven't heard from them yet. Should I assume the answer is no, or should I place a follow-up phone call? If the latter, when should I call?