Get 1-3 local businesses to buy a premium ad spot on your app. You can craft the ad with them and place it (side of the chat, top of the chat, etc). Charge them

Get 1-3 local businesses to buy a premium ad spot on your app. You can craft the ad with them and place it (side of the chat, top of the chat, etc). Charge them anywhere from $300-$1500 per-month. Get a few of those and that should cover you and then some.