I traded housework for room and board last year but have moved on, can I get a stimulus check?

Under the CARES Act, if you are claimed or COULD be claimed, as a dependent on someone else’s return, you cannot receive a stimulus check, in 2020.   If you could be claimed as a dependent for 2019, but can not be for 2020, you will most likely get the stimulus  in 2021.

"In essence, the stimulus check acts as an advance of your 2020 income tax refund. This means when you prepare your 2020 income tax return, there will be a line to include the section 6428 credit (line 30 on the 2020 form 1040). The credit on your 2020 return is subtracted by any amount received as a stimulus check in 2020. If the amount you received as a stimulus check is less than the credit you are due, the difference will be included as part of your 2020 refund. If you have been overpaid by receiving the stimulus check, however, you will not be required to return any excess amount".

See full dependent rules at: https://turbotax.intuit.com/tax-tools/tax-tips/Family/Rules-for-Claiming-a-Dependent-on-Your-Tax-Return/INF12139.html