Overall, for every type of property....I would say that keeping up with proper maintenance is what most people neglect.

Quote from @Michael Smythe: @Jerry NoguerasRecommend you first figure out the property Class you want to invest in, THEN figure out the corresponding location to invest in.Property Class will typically dictate the Class of tenant you get, which greatly IMPACTS rental income stability and property maintenance/damage by tenants.If you apply Class A assumptions to a Class B or C purchase, your expectations won’t be met and it may be a financial disaster.If you buy/renovate a property in Class D area to Class A standards, what quality of tenant will you get?

Or if you want to swap higher returns for lower maintenance you can look in to FIG (fourplex investment group_.

Landlord will promptly respond to Tenant request for repairs but will not be monetarily responsible for tenant disruptions or inconveniences during habitable times of repairs or tenant/guest injuries incurred in or around obvious areas of maintenance, repairs, or construction.We are more converned about them expecting us to pay for their losses rather than getting recouped for damages to our property. 

You’ll need to treat it like a business—handling tenant management, accounting, legal compliance, property maintenance, and more.That said, when done correctly, it’s a powerful tool for building wealth!

Maintenance, We had a pool so I know first hand, you really need daily work on a pool. 

@Zach Howard some copy & paste advice below:)-------------------------------------------------------------------------------------------------Recommend you first figure out the property Class you want to invest in, THEN figure out the corresponding location to invest in.Property Class will typically dictate the Class of tenant you get, which greatly IMPACTS rental income stability and property maintenance/damage by tenants.If you apply Class A assumptions to a Class B or C purchase, your expectations won’t be met and it may be a financial disaster.If you buy/renovate a property in Class D area to Class A standards, what quality of tenant will you get?

The structure is mainly appreciation-based, which minimizes tenant and maintenance risk. 

They allowed in the proforma for a 3% maintenance.

High demand and still relatively low entry costs.