Animal Welfare Professionals

Hi! I am a volunteer grant writer for a very active Bucks County,  PA cat rescue , with annual donation income of roughly $100,00. The first time we put together a grant, the rescue director (who has a full-time and part-time job on top of running the rescue), had to go through her accounts and figure out her donation & fundraising income, and tally up what she spent. I asked her to put out a call for a few free hours of an accountant's time. She wasn't on board with anyone looking over her books. So I suggested accounting software. What do you use in your rescue? What are its strengths? What are the accounting software's limitations? How much did it cost? Thanks in advance for