@Barrington SmithI use this equationto back into my maximum allowable offer (MAO)ARV - Rehab Costs -Holding Costs - Purchase & Sale Costs - Desired Profit as a percentage ofARV = MAO

Every loan program sets a maximum percentage of that value that someone can borrow. 

What percentage will I get hit with?

David,If you are thinking of getting insurance for the Property Management activities under the LLC, they consider the percentage of management of properties you own.  

Some areas may have specific rules regarding the percentage of time you need to reside in the property.Remember that real estate investing is both an art and a science.

What if the investor partners up with a general contractor who's willing to do the work for "free" in return for a percentage of the cash flow and/or a percentage of the equity?!

We don't use percentages at all in our calculations.

Interest rates for primary residence are typically about 1 percentage point lower than conforming investor loans so if you can buy a new primary residence and rent you current one out you will save a lot of money on interest payments.3.

Deductibility depends on the type of charity and is also subject to a percentage of the taxpayer’s adjusted gross income.

Deductions are depending on the percentage of the property that is rented out.