As Americans increasingly turn to rentals rather than buying homes, a new Phoenix-based commercial brokerage firm looks to take advantage, by uniquely focusing on residential rental investment portfolios. The firm, SVN | SFRhub Advisors says it is the first firm of its kind to specifically focus on single-family residential rental portfolios (SRFs) and new build for rent (BFR) investment portfolios from five to 5,000 homes across the country. The firm is led by Jeff Cline and Mike Finch, who…