Thanks in advance.SFH for sale :  3 Bed,2 Full Bath -$100,000.00  ( Baltimore County 21207)ZILLOW VALUE : 120,000.00Average Rent : 1,600(I called 4 similar Properties Same Area for Rent -Realtor.com)I am planning on buying using my own cash and then use Fannie Mae-Delayed Financing Exception to recycle (3 to 4 weeks)my money and repeat.Mortgage Loan PI :   30 years 4.6%            $ 513.00Property Tax  :                                               $ 209.00Insurance:                                                       $  28.00Total :                                                              $ 750.00Utilities/landscaping Paid by Tenants and Major Repairs by Landlord.Cash Flow  :  $ 1,600- $ 750=   $ 850.

@Karyn SeabergWe make the tenants take care of all landscaping, and do not provide a mower.

You can use any of the free electronic payment options for payment other list.   

Install an electronic fireplace in the space so they get the ambiance and heat but not the risk;2.

From google maps pictures (2015) there were 5 additional homes that have been moved or torn down.EXPENSESStick built homes pay for all utilities.Park owner pays for water/sewer of mobile homes.Property taxes $2,000 yearly (166.67/mo.)Water/sewer, Trash, landscape, snow removal, etc monthly average $350There are additional misc expenses roughly $40/mo.Asking price $65k (15 yr mortgage about $400/mo.)Insurance unsure yet.  

Could someone provide examples of what mild vs extreme due diligence would look like with a 4 unit house that requires a moderate amount of TLC from the landscaping to the plumbing and electrical?

@Jake Wernitznig buyers frequently don't factor in the costs of landscaping new construction.

No allowance for new landscape, privacy fencing or flatwork rehabilitation.   

Paint, flooring, cabinets, bathrooms, lighting, windows, landscaping?

I would highly recommend starting of with only accepting electronic payments.