My maintenance is little to nothing as we do the reno correctly.

Then based on @Michael Baum's suggestion, I think I will have my cleaner and/or maintenance person do monthly/quarterly maintenance like using using enzyme based cleaners, grease fighting drain treatments and hot water flushing. 

Since this four-plex is in my region, I will be the one taking care of maintenance and management while the investor won't have to worry about anything but to receive the money haha.Let's confirm a few things before you get questions from a bunch of other folks on the forum.How much of your own cash/equity are you planning to contribute/invest to this deal?

That means weekly on going preventative maintenance fixing small problems before they become big problems. 

Outside of aesthetics, make sure you have cleaners, maintenance and turnaround worked out so you go in with a solid plan.

@Ming HuangRecommend 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?

In terms of maintenance, they are generally safer because you are not responsible for the exterior and common areas and potential leaks, etc.

If you're looking for a Cleveland duplex in a C Class neighborhood with $120ks as your purchase price, you are looking at properties with deferred maintenance.

@Amir PortalRecommend 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?

Consider tenant stability, including consistent payments and maintenance of the TOH.