Make sure the mobile home's electrical system can handle the amount of power these space heaters require, and stay away from those that blow out hot air that might catch draperies or furniture on fire, and instead opt for the "radiator" style ones that don't have a hot element or fan but instead offer radiant heat that won't catch things on fire.

I would have thought that the conventional style gas boilers would last longer since they’re much simpler.

"The MUR-45 zone would allow housing styles such as row-houses, town-homes, apartments; and commercial uses, including: live/work lofts, ground- floor commercial with residential units above, senior care facilities, and professional offices."  

Are other homes in this neighborhood the same age and style as the subject?

Purchase price: $63,000This is a 3 Bed 2 bath ranch style home.

If I had to choose one or the other for Chicago,  I would choose Minneapolis style zoning, increasing the standard lot zoning to allow 2 flats and 3 flats.

@Adrian Gonzalez yes, "debt to income" (DTI) is factored in all government style loans (FHA/VA/Fannie Mae/Freddie Mac/etc) but an important element is that your DTI should get BETTER for each investment property you buy...because we only buy properties that cash flow, right? 

Large Cap Ex Items Doneregraded and paved driveway and all of parking lotAll new vinyl replacement windowsVinyl siding on both buildingsBuilt: less than 35 years oldGarden Style, 2 Buildings, one is 6 units, one is 8 units(efficiency apartments)I look for 10% 1st year roi based on 25% down and closing costs to buy property.Current Income-90,000 (current owner assumes 15% vacancy rates to be safe)Current Expenses-57,000( 2018)I see a potential for income to be- 95-98,000 within next 18-24 monthsExpenses-I calculated at 51,000 within next 2 years including the below metrics.All trash removal costs, property taxes and insurance costs were factored in as well.10% cap ex11% M and R(turn overs were included in this figure and 1/2 months rent paid to prop. management company for screening new tenants and placing them)6.5% current property managementI calculated my cash flow after paying mortgage and all the expenses was around 5,800$ per year.  

Purchase price: $123,000 Cash invested: $30,000 Single family ranch style home with single car garage and large corner lot.

Purchase price: $360,000 Split two family ranch style with a great bones.