Long term reviews of house churches find they grow slowly because of lack of elders.
It seems to be an insurmountable problem and many units are tempted to hire at least one seminary trained leader in a salaried capacity.
Similar to the insurmountable situation until God opened the eyes of Elisha's helper to the resources of God. The chariots don't carry people, although Elijah was taken away in one. They are symbols of God's power, understandable to men.
2 Kings 6:15-17
15Now when the attendant of the man of God had risen early and gone out, behold, an army with horses and chariots was circling the city. And his servant said to him, “Alas, my master! What shall we do?”
16So he answered, “Do not fear, for those who are with us are more than those who are with them.”
17Then Elisha prayed and said, “O LORD, I pray, open his eyes that he may see.” And the LORD opened the servant’s eyes and he saw; and behold, the mountain was full of horses and chariots of fire all around Elisha.