Frugally.

that means living frugally, on a very tight budget

Yes. If these are US dollars, one person can live frugally on that amount for several years.

"The truest happiness" on Animal Farm is "working hard and living frugally."

Frugality means different things to different people... another way of saying it is "conserving resources" or being outright stingy.

Living with just the very basic needs of life. Not eating out, no TV

or Internet, not buying anything unless it is really needed. Disposing of all the stuff you do not use anyway and trying to generate income.

Trust you will be able to think of another hundred items on where to save.

Hope the result will be worth the sacrifice. Good luck