If you spend steem to build a well or give food those people will never buy steem because they dont have.

Have you got a money? Buy a land. Plant vegetables. Buy a pigs or cows chickens. So you dont need to buy food to donate.
Make a well but make it solar.

I can give you a lot of ideas.

Lets say you have crops and animals. Sell it. Than 50% you can donate 30% keep for the team and 20% deposit in steem so you can have always some money from steem. Power up. Upvote similar charity projects. Or onboard new users and support them with your vote.

😉

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