1099 for Per Diem Meals

Due to a large home repair, my builder is offering me $150 per diem for meals OR reimbursement daily limit of $150.     If I take the per diem, he advised I would get a 1099.     This is less than the federal rates for my area.     I would rather not deal with the hassle of collecting itemized receipts and waiting for the reimbursement.    How should I handle this on taxes?    If I net out zero, I would prefer the per diem.   I am retired so quite a simple return.  Thank you!