I haven’t tried this myself as a provider, but I have recently been using apps like Thumbtack and Takl as a client. The apps connect users with providers of household services – everything from simple repairs to furniture assembly to yard work. From a provider perspective, it eases the burden of marketing yourself, bidding on projects, and scheduling. Once you’ve connected with clients and established a professional relationship, you don’t necessarily have to use the app(s) any more – it’s essentially a networking tool. I think this would be convenient for someone wanting to make a extra money for the holidays – you bid only on the projects you choose, so you are in total control of your own schedule.
Of the two apps, Thumbtack seems to offer more “professional” services (eg electrical work) than Takl (house sitting) but there’s plenty of overlap between the two.
Takl
https://app.takl.com/register
Thumbtack
https://www.thumbtack.com/pro