Kastle’s Remote Video Guarding enables this by employing AI-enabled video surveillance to trigger live response from a remote Video Operations Center, proactively supporting onsite staff as needed to ward off threats with faster response than guards at less expense.You might be surprised where trouble pops up.

Right now even junk bonds are only paying 4% on average, so where is the seller going to get better yield elsewhere on a fixed income instrument that is collateralized by an asset they know and understand with an operator (you) that they know, like and trust?

Narrow it down to the operation side versus the finance side.  

With a multifamily property there’s almost always someone in one of the units operating like a built in safety net minimizing your losses from non-payment or times of vacancies (remodels/repairs, broken leases, etc..) in one of the units.One more reason to invest over buying is as the equity grows. 

and as such the more return / risk the more the investor needs to be hands on .. that's what I see in the industry. greatest returns are by owner operators who do it for a living EVERY DAY. 

I would suggest the expenses of operating an ADU are reasonably minimal, so let’s assume they are 15% of annual revenue (and tenant pays their own utilities).$1,500/month x 12 months = $18,000 annual ADU rental income$18,000 income – $2,700 expenses = $15,300 net annual revenue$15,300 net revenue / $100,000 investment = 15.3% annual return Two Bedroom (700sf)Lets assume the total cost of this unit is $225,000 ($321/sf) and the rent we can achieve for this nice, new 2 bedroom ADU is $3,000 per month.

Check in your climate first though, with an HVAC person.Compare your operating costs. 

Since mailers are too expensive to use if you are only buying one house, they work if you a large-scale operation that can buy multiple at a time and purchase houses whenever a good deal comes. 

Own and operate about 35 units.

I have never replaced a heating/cooling system that was operational.