Most of the options reviewed here are devices that you can connect to your computer, but this is not the only technology you can use for scanning receipts. With the right application, you can scan documents with iPhone app. While this option is very portable and convenient, the drawback is the lack of specialization in receipts scanning, it's also only budget friendly if you already have an iPhone. An iPhone scanning app ultimately relies on the iPhone's camera, so keep in mind these limitations when considering this option.
When deciding which scanner best serves the needs of your home office, make sure that the scanner you choose is compatible with your computer, and that you have a system to effectively organize your receipts.