create financial spreadsheet for small business

I have a small business that I would like to create an easy accounting method to help me see income and expenses. I am also considering selling the business so I need to show other people the income and expenses. I would also like to break down income and expenses by category. The business is a real estate biz which collects rental checks then mails the balance to the owner minus our fee sometimes I will pay a commission on the rental. We also sell properties so we collect a deposit until closing then get paid a commission at closing so the deposit will often become part of our commission, I need a place for the business to pay a commission to the agent. Lastly, we charge a fee to list properties, rebate list fees when we sell properties and lastly I pay a commission for listings. I am looking for someone to take my information and create an easy accounting system and do the data entry. There are less than 100 entries for income and expense YTD.