I have two options 6.625% 30 year or 6.15% 15 yearI want to invest aggressively in the near future on more propertiesThe loan is only $110k and the monthly payment for 15 year is $563 and $750I will earn 2-3k a month in gross rental revenueThe property is in a declining population areaRecently rennovated, and all major things were relatively recently improved such as plumbing, the roof, a/c, electric, etc.Will require a lot of management as it is rent by the room so I may switch to a normal rental after 10 yearsI'm trying to find what will mathematically net me the most money in the long run.

Property ClassProperties are categorized by class, impacting their quality, condition, and investment profile:Class A: High-end, newly built, prime locations, attractive to institutional investors.Class B: Good quality, older than Class A, with minor deferred maintenance.Class C: Older properties with dated amenities, but value-add opportunities exist.Class D: Distressed properties in less desirable locations with high risks but potential for significant improvement.4.

Self managing C class units can be very deceiving.  

@Joe Gellenbeck 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 Class A property in Class D area, what quality of tenant will you get?

C-class for cash flow)I agree with @Evan Polaski that you need to know the market inside and out before you invest.

@David Spurlock from approximately 2012 to 2016, you could buy a depressed valued Class A rental and rent it for immediate cashflow in many parts of the country.After Class A property values recovered, investors moved to buying Class B rentals - but used the same assumptions they used for Class A rentals.After Class B property values recovered, investors moved to buying Class C rentals - but used the same assumptions they used for Class A rentals.

They are usually looking at C or D properties that local agents tell them will “cash flow“ They usually don’t cash flow because of high maintenance and vacancy.

So, to get 10+% cap rates, are you open to buying gut-rehab, Section 8 properties in C/D neighborhoods in the Midwest?

@Daniel GrantzRecommend 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?

@Andrew C.