Self employed

You perform one line of work as a self-employed person. That is housekeeping. It doesn't matter who pays you, whether it's 15 different people, an agency or a combination of both. If an agency issues you a 1099-NEC, enter it on that line. If others pay you by check, include it as cash.

It is possible to both clean and paint houses. While these might seem similar enough to include as one line of work, they would each require their own Schedule C.