For the actual sill material you can look at a slightly sloped tile, or a quartz/granite solid surface material if you want to avoid joints.

If he meets the 2-out-of-15-year rule and lives in the house for 24 months before selling, he can exclude up to $250,000 of gains (or $500,000 if filing jointly) from taxes.

I think you "move on" when you both come to a joint conclusion that it's what you want to do, not what you have to do. 

The check goes to the lender jointly with the seller's name. 

The terms can always be restricted based on who's bringing what to the table, but in generality you are looking at a active and passive joint venture agreement.Have you not taken on any partners until this point?

Look out for joint leaks and pin hole failures due to corrosiveness of other metals joining to the copper and or metals in the water supply.

Let’s assume that John Doe lives in Colorado and that his filing status is Married Filing Jointly.

Joint Ventures and Partnerships4.

I am a 29 year old male, married, with joint income living in Dallas.

Hey John, You cannot use a cost segregation to offset your w2 income unless your married filing jointly and your wife is a CPA (in most cases).