Please find me alternative to this term: 'according to their capability and sincerety'?

Question

I know the term in this capitalized words does not work.

Context:

In that connection, LKM has offered a Cash Endowment Program which is designed in a very simple way and it expects that all people from all social levels will be able to participate and give their contributions ACCORDING TO THEIR CAPABILITY AND SINCERITY in order to replace the village land in other areas covering 20,000 M2, and to build an institute, Outbond facility, Healthy House, Earth Library, Historical Museum of Lengkong and LKM office “Bookstore” as well as sports facilities such as jogging track, basketball court, badminton court, Volleyball court, football field and swimming pool.

Answer 1

depending on their means and commitment

Answer 2

As best they can and really want to.

Answer 3

accoriding to their limits