Edward Mermelstein Of One & Only Holdings Talks International Real Estate... Edward Mermelstein, Founder of One & Only Holdings, started his career as an attorney[...] July 20, 2020 / Andres E. Caceres / Tags: bulk purchase, edward mermelstein, Haute Residence, New York City, new york developments, One & Only Holdings, One and Only, One and Only Holdings, real estate, Real Estate Investment, soviet union, Ukraine