I think it’s ridiculous to say that if someone is mekarev someone, they then have to support them financially.
I think the point was that you have to provide the person with the tools needed to finish the job without your assistance, unless you’re planning on being a permanent mentor.
An analogy would be teaching someone to drive a car, but omitting some details, such as how to turn on the headlights when it gets dark, or how to make left turns.
On the other hand, BTs find that the z’chus of teshuva gets amortized over the years, so eventually they feel very much like a stam Yid. They may still have a strong sense of bechira, but it’s very hard to transmit it to their children.
I’ve read that paragraph several times, but can’t quite figure out what it means.