As far as the credit for low-income renters goes, I think it’s important to remember that if a couple has adjusted gross income over $30,000, they don’t qualify at all.  Note that a renter with social security and non-taxable pension income of over $30,000 could qualify, however. 

The credit is $50 per exemption, so a qualifying family of four would get $200, which comes nowhere near the amount of GET in rent, even at $1,000/month.  A retired couple (over age 65) bringing in social security and pension income of $50,000 or more could also get a credit of $200.