I am actually thinking if I should purchase one for my primary residence. 

Hi Tyquan, An FHA loan would be an option for the use of a primary residence purchase. 

Purchase price: $135,000 Cash invested: $130,000 Sale price: $349,900 Better than new!

The more efficient solution might be to purchase from Grandma with the 25% down..you ca use the income to help qualify and obtain gift funds or other sources for the down payment.

Purchase price: $268,750 Cash invested: $60,000 Sale price: $430,000 Contributors: Peter Vekselman Partner Driven, in collaboration with Mike Hardin, successfully completed a fix-and-flip on N Deerview Dr, Lake Villa, IL 60046.

We recently found a condo willing to do owner financing at a 4% interest rate with a purchase price of $500,000.

As you mentioned, you can depreciate the improvement value over 27.5 years for residential property.So, to calculate the depreciation recapture after 5 years, you can use the following formula:Depreciation Recapture = (Original Improvement Value / Useful Life) x Accumulated Depreciation x Time HeldIn your example, it would be:Depreciation Recapture = ($200,000 / 27.5) x (5 years) = $36,364.36So, after 5 years, your accumulated depreciation is approximately $36,364.36.Now, when you sell the house for $400,000, the profit you'll have to consider for tax purposes would be:Profit = Selling Price - Adjusted BasisThe adjusted basis is the original purchase price minus the accumulated depreciation.

Purchase price: $475,000 Duplex, move in ready, one side had a renter.

I've included an example below to help illustrate this.So different lenders have different rates (which do vary even for DSCR loans) but these are factors they all consider.See example below:DSCR < 1Principal + Interest = $1,700Taxes = $350, Insurance = $100, Association Dues = $50Total PITIA = $2200Rent = $2000DSCR = Rent/PITIA = 2000/2200 = 0.91Since the DSCR is 0.91, we know the expenses are greater than the income of the property.DSCR >1Principal + Interest = $1,500Taxes = $250, Insurance = $100, Association Dues = $25Total PITIA = $1875 Rent = $2300DSCR = Rent/PITIA = 2300/1875 = 1.23If a purchase, you also generally need reserves / savings to show you have 3-6 month payments of PITIA (principal / interest (mortgage payment), property taxes and insurance and HOA (if applicable).

I probably have less answers for you, and more questions...We don't really know your experience level, so my first question is, do you realize you typically have to have about 20-25% "skin" in the game for this purchase?