Don't Shop til you drop - WORK til you drop!
Do they know WHY they want to leave where they are at, to come to where you are? Are they "shopping for a better 'church family?'" Oh, groan...
And, is it really as Pure as "just wanting God's Will to be done?" Usually not. Very often there is a mixture of self-centered and shallow motives that need to be purged in order for them to REALLY hear God's Voice as to where they should live. That's one way you can help them. Don't let them bail out on where they already live so easily as they may desire.
And, to be honest, if they aren't ACTING on what they've learned WHERE THEY ARE AT, they will likely be trouble when they move to where you are.
Remember the story of the caterpillar that NEEDS to break free from the cocoon, and the chick that NEEDS to break out of its own egg - in order to be strong enough to LIVE once they get out of their "bondage?" These are good "visual aids" to what is absolutely the case in the Spiritual Realm. People must do what they CAN do in the place where they are at, or He will grant them nothing more anywhere else. Jesus promised this would be true on several occasions.
WE must "walk as Jesus walked, if we claim to be in Him." And, Jesus "did nothing in secret." He made it clear "daily in the public places" exactly where He was coming from. He "would have gathered them... but THEY would not." If we're living Jesus' Way, then we won't just "sneak out the back door of the burning building" and leave everyone else in the dangerous and unBiblical situation that we know to be untenable with God's Heart and Will and Commands.
We'll "do nothing in secret" and deeply desire that all come along. If they "would not" after we have spilt blood and tears for them, then the Kingdom will go to those who will bear its Fruit. To just "sneak out the back door" - or allow anyone to move to where you are at that has not spent themselves tirelessly and with great risk, "from house to house with tears" and giving out written things and encouragements "daily, so that none are hardened and deceived" - is inviting trouble later on. Everyone must give themselves to the current relationships that Father has granted them, and fight for their souls and obedience to His Ways, until they are warmly received... or rejected or thrown out. This is God's Way in most every case - because it is Jesus' Way.
Oh HOW DIFFERENT this is from the "recruiting nickels and noses" that virtually every religious group is so known for! God's Way is to help His People learn to OBEY Him, that they my learn to HEAR Him. (Rom. 12:1-2; John 7-8; Gal. 5; etc) If we help everyone to respond to His Commands so that they may Hear Him better, then HE can build His Church as He pleases, without us getting our fingers all over it! Hallelujah!