Question Regarding A View That Is Taking Long Time To Process

Good afternoon everyone, I have written a view that pulls customer demographic  infomration as well as pulling data from multiple scalar-valued functions.  I am using this view to pull and send data from one database to another in the same SQL server.  The problem that I am having is that I am running this import as a scheduled job in windows.  The job is taking almost 24 hours to complete this task.  The total number of records that are being pulled is around 21,000+.  I have tried removing the functions from the view and it only takes the view 20 seconds to pull the demographic information from the same 21,000+ records but when I add the function calls this is where the time to complete goes through the roof.  Has anyone encountered this before if so what would you suggest doing?  Any help would be appreciated.
 Here is the syntax for my view:

 SELECT TOP 100 PERCENT CUS_EMAIL AS Email, CUS_CUSTNUM AS MemberID, CUS_PREFIX AS Prefix, CUS_FNAME AS FirstName,
CUS_LNAME AS LastName, CUS_SUFFIX AS Suffix, CUS_TITLE AS Title, CUS_STATE AS State, CUS_COUNTRY AS Country, CUS_ZIP AS ZipCode,
CUS_SEX AS Gender, CAST(CUS_DEMCODEA AS nvarchar(20)) + ',' + CAST(CUS_DEMCODEB AS nvarchar(20))
+ ',' + CAST(CUS_DEMCODEC AS nvarchar(20)) + ',' + CAST(CUS_DEMCODED AS nvarchar(20)) AS DemoCodes,
dbo.GetSubScribedDateMLA(CUS_CUSTNUM, CUS_EMAIL) AS MLASubscribedDate, dbo.GetSubScribedDateMLP(CUS_CUSTNUM, CUS_EMAIL)
AS MLPSubscribedDate, dbo.GetSubScribedDateLDC(CUS_CUSTNUM, CUS_EMAIL) AS LDCSubscribedDate, dbo.GetMLAExpiration(CUS_CUSTNUM,
CUS_EMAIL) AS MLASubExpireDate, dbo.GetMLPExpiration(CUS_CUSTNUM, CUS_EMAIL) AS MLPSubExpireDate,
dbo.GetLDCExpiration(CUS_CUSTNUM, CUS_EMAIL) AS LDCSubExpireDate, dbo.IsProspect(CUS_CUSTNUM, CUS_EMAIL) AS AGMProspect,
dbo.IsCurrentCustomer(CUS_CUSTNUM, CUS_EMAIL) AS AGMCurrentCustomer, dbo.IsMLAMember(CUS_CUSTNUM, CUS_EMAIL) AS MLAMember,
dbo.IsMLPMember(CUS_CUSTNUM, CUS_EMAIL) AS MLPMember, dbo.IsLDCMember(CUS_CUSTNUM, CUS_EMAIL) AS LDCMember,
dbo.CalculateTotalRevenue(CUS_CUSTNUM, CUS_EMAIL) AS AGMTotalRevenue, dbo.GetPubCodes(CUS_CUSTNUM, CUS_EMAIL)
AS ProductsPurchased, dbo.GetEmailType(CUS_CUSTNUM, CUS_EMAIL, CUS_RENT_EMAIL) AS EmailType, CUS_COMPANY AS Company,
CUS_CITY AS City
FROM dbo.CUS
WHERE (CUS_EMAIL IS NOT NULL) AND (CUS_EMAIL <> '') AND (CUS_EMAIL_VALID = 'Y') AND (CUS_EMAIL LIKE '%@%.%') AND (CUS_RENT_EMAIL = 'Y' OR
CUS_RENT_EMAIL = 'R' OR
CUS_RENT_EMAIL = 'I') AND (CHARINDEX(' ', CUS_EMAIL) = 0) AND (CUS_EMAIL NOT LIKE '@%')
 

Thanks in advance
 
Michael Reyeros