Hold on,
"To make up the difference to get Schweizer to that magical $184,900, Thomas also helped her get a second mortgage through the CHFA. It was a loan for $5,446 at 4.75 percent, fixed rate for 30 years"
She took out a $5446 30 year loan? Is that normal?
Personally I'd feel very anxious doing what she did. It's all well and good to buy a house and have the comfort of knowing you'll own it by the time you retire, but she won't be done paying for it until she's nearly 80. It sounds like her 401k barely has anything in it now, so she won't have an awful lot to retire with. She could end up having a hard time making those payments plus property taxes and insurance which aren't going to stay at a fixed rate.