Late payments, non-payment, foreclosures, monitoring draw schedules and confirming progress, etc.Then you get to syndications, which are passive, but likely only yielding 5-8%, so you are back at 15-24k/yr of income.  

Ideally I am looking for an excel sheet to monitor my monthly rentals and any expenses (mortgage, tax, insurance ...etc).I appreciatre if someone can share that with me.Regards,

During periods of heavy rain and high heat, this place EXPLODES in growth rate, just a massive difference from what you get with less precipitation and cooler temps.So even though I make arrangements with my tenants to cut the grass at my places, as the self-managing landlord, I still drive around every week and more frequently during rainy/hot periods and  and monitor what's going on.

I'm speaking to him about monitoring the rehab process and how he could be compensated for his time currently.

Here are some articles about Zigbee and Z-Wave technology:https://www.cnet.com/home/smart-home/smart-home-hubs-zwave-and-zigbee-home-automation-wifi-eero/https://www.safewise.com/blog/zigbee-vs-zwave-review/We thought this was a great article about AirBNB home automation technology and costs with a real world example: https://www.motoretreat.com/automation/And here are the technology providers:Seamhttps://getseam.com/Everydoorhttps://www.everydoor.io/KeyCafehttps://www.keycafe.com/Remote Lockhttps://www.remotelock.com/smart-locksSchlagehttps://www.schlage.com/en/home/smart-locks.htmlYalehttps://us.yalehome.com/en/yalehome-products/nest-x-yale-lock1/https://us.yalehome.com/en/yalehome-products/yale-assure-lock-and-levers1/yale-access/https://us.yalehome.com/en/yalehome-products/yale-pro-sl-yrd156yrd136/Kwiksethttps://www.kwikset.com/haloeRentalLockhttps://erentallock.com/SmartThingshttps://www.smartthings.com/SmartThings/automaterhttps://community.smartthings.com/t/release-rental-lock-automater-airbnb-vrbo-homeaway-tripadvisor-booking-expedia/124785Hubitathttps://hubitat.com/Winkhttps://www.wink.com/products/Noise / Smoking DetectionKeycribhttps://keycrib.com/Property monitoring to manage noise, smoking, keyless entry and guest behavior with real-time alerts, bonds, and contracts.Accounting IntegrationGuestRevenuehttps://guestrevenue.com/Reconciles multiple listing services with Xero and Quickbooks.Maintenance / RepairPlentifichttps://www.plentific.com/en-us/Plentific works with landlords to transform how they deliver repairs and maintenance services.

If you don’t monitor things I’m sure the numbers could be higher.

Monitor your ads every 2-3 days and ensure your budget is optimized.

You are monitoring operations, and execution of business plan.  

The risk is much greater though - you might get stuck with a horrible property manager or if you are doing any rehab work without being there physically to monitor contractors, the deal can become a disaster. 

Is keeping any eye on these same metrics the only way to indirectly monitor the supply-demand equation?