I collect rent by cash, check, money order, cashier's check, zelle or PayPal.
Almost everyone who uses a major bank, and some credit unions, go with zelle. It's free for them and me, transfers happen within a business day and it's managed through their banks website so it feels safe. My only issue with zelle is that there is a $2k limit which, in my market, is too low to pay most rents so people have to pay $2k on the 1st and the balance on the 2nd.