Please be careful about asking for donations for the physical needs of people in your ministry. Every church has needs, including those churches who support you. Every pastor knows hurting and needy people, including those pastors who support you.
It is natural to want to help all those whom you love and to whom you minister, but your supporting churches have limited funds and are investing for spiritual rewards. It may be wiser to ask only for donations for your ministry and then use funds from your ministry to help those who are in need.
There are always exceptions, and you may know people who really want to help. We simply ask that you use some extra discretion in this area.