here are a couple internet startups of note in the shared parking and household/business cleaning arenas. Certainly these have all been done before, but there is room for improved reliability and payment options.

https://www.smartcitiesdive.com/news/parking-network-airgarage-wins-phoenix-smart-city-hack/508031/

https://www.axios.com/cleaning-is-a-profitable-business-for-these-two-startups-2502432673.html