I think that sometimes we 'pay forward' with things more valuable than money.
Each person will know what that is when the situation is right. And they will know how much according to their own circumstances.
Time. Labor. Physical Assistance. A warm-dry bed or a blanket to a needy person. I think these are all ways to pay forward. Each person to a greater or lesser degree. I would not want anyone that I assisted to feel obligated to provide identical assistance. I think it can possibly add to the current stress.
Take what you need. Let the people who love you show that love in whatever way they can - even if it's just money. Pass along what you can when you are on more stabile footing.
-Aude.