If it were me, I'd keep the office, but that's because I like the feeling of having a place to go to work. For you, it seems like a virtual office may be best. You may miss out on some agents to prefer to have an office.
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Dee Copeland, ABR, ASR, CRS, e-PRO, GRI, SRES
Broker-Associate, Keller Williams Realty
http://www.CopelandGroupRealty.com
http://www.TexasRealtyBlog.com