SQL Server 2012 :: Using Unions To Write Out Each Select Query As Distinct Line In Output

Basically I'm running a number of selects, using unions to write out each select query as a distinct line in the output. Each line needs to be multiplied by -1 in order to create an offset balance (yes this is balance sheet related stuff) for each line. Each select will have a different piece of criteria.

Although I have it working, I'm thinking there's a much better or cleaner way to do it (I use the word better loosely)

Example:
SELECT 'Asset', 'House', TotalPrice * -1
FROM Accounts
WHERE AvgAmount > 0
UNION
SELECT 'Balance', 'Cover', TotalPrice
FROM Accounts
WHERE AvgAmount > 0

What gets messy here is having to write a similar set of queries where the amount is < 0 or = 0

I'm thinking something along the lines of building a table function contains all the descriptive text returning the relative values based on the AvgAmount I pass to it.