Refinance home to pay student loan?

Two income family here, one lost a job not likely to find another near the same pay range. Have Parent Plus loan with $60K, mortgage with $135K balance on a $270K house. Struggling to pay both mortgage at $1364/mo and student loan at $720/mo. Current mortgage is on a 15 year loan, considering making it 30 year when I refinance to keep the payments near what they are now. Not in trouble yet, no other kind of real debt, but burning through savings. Have one more kid to send to college in 4 years. Another consideration I had was selling and moving to a smaller home worth $140K, but that is a big cost also. Family income was $160K, now $100K which includes a current lower paying job for the one who lost a job. Any suggestions are appreciated. Thanks.

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