We were at school together http://egotastic.in.net/ egotasticallstars.com âLending to smaller aggregators of single family rentals is a sound natural progression,â Martin Lifschutz, managing director for real estate risk at Citigroup Inc.âs institutional clients group, said in an e-mail. âOne of the main concerns has always been operational risk for those investors aggregating single family rentals nationally. By lending to smaller investors who tend to be in only one and two markets, there is less operational risk and more local market knowledge,â he said. The loans may also be included in securitized bonds, he said.