No receipts for repairs

I’m a small landlord with a few single family properties.  Typically they are low maintenance, but every now and then something needs to be repaired/maintained so I usually find a local independent handyman of sorts to come repair the issue.  The people I hire don’t work for a company. For example, I usually cashApp the local neighborhood boy $50 to cut the grass at one of the properties. The problem is these local guys don’t have invoices, or give me receipts for me to upload for tax purposes. They are legitimate expenses that are able to be written off but again, how do I show this?