The more properties I own, the more valuable I am as a customer and the better pricing, treatment etc I get.Regardless, if you want warranty coverage, then the plumber will typically require you use their product.  

Here's a pretty comprehensive sticky thread on this topic: http://www.biggerpockets.com/forums/93/topics/54108-buyer-s-list-how-to-

Purchase Price: $50,000.00 Purchase Closing Costs: $1,500.00 Estimated Repairs: $5,000.00 Total Project Cost: $56,500.00 After Repair Value: $85,000.00 Down Payment: $12,500.00 Loan Amount: $37,500.00 Loan Points: $750.00 Loan Fees: $1,600.00 Amortized Over: 30 years Loan Interest Rate: 4.75% Monthly P&I: $195.62 Total Cash Needed By Borrower: $21,350.00 Monthly Income: $750.00 Monthly Expenses: $552.37 Monthly Cashflow: $197.63 Pro Forma Cap Rate: 8.35% NOI: $4,719.00 Total Cash Needed: $21,350.00 Cash on Cash ROI: 11.11% Purchase Cap Rate: 9.44% Total operating expenses: $356.75 Mortgage expenses: $195.62 Vacancy: $60.00 Repairs: $60.00 CapEx: $60.00 Insurance: $85.00 Management: $60.00 P&I: $195.62 Property Taxes: $31.75 Financial InfoIncome-Expense Ratio (2% Rule): 1.33% Total Initial Equity: $47,500.00 Typical Cap Rate: 8.00% Gross Rent Multiplier: 5.56 Debt Coverage Ratio: 2.01% ARV based on Cap Rate: $58,987.50

This link will take you to a pretty comprehensive overview. http://www.health.ny.gov/publications/2502/You don't always have to remove lead based paint but it's important to know how to handle it. when you do and when you don't.

@Charles Smith We try to get a CAP of 8%+, cash on cash 12%+, and debt coverage ratio 1.6%+Paul

Personally I think the best coverage is a Renter's policy.

If you don't have one already, get an Umbrella Policy in place to give you extra liability coverage... not only for dogs, but for other events that could put you at risk.6.

If so, then;The value of the property can derive rents, apply a cap rate (like 10%) and compute a payment over a term of 10, 15, 20, 30 years and add taxes and liability coverage as well as 10% for messing with it.

What if you wish to get coverage exceptions removed?

These aspects are required to understand seller financed and other non-traditional transactions, knowing secondary market requirements isn't enough.Beware of the marketing by RMLOs, we had one here that was advocating some scary stuff beyond his comprehension.