Can you direct me to someone who can help assess what opportunities there are for me as a 30% or more service-connected disabled veteran to start up an art and antiques business?

First of all, if your out less than 12 years you are a eligible for Voc Rehab assistance at the VA. Otherwise, SDVs get certain procurement preferences when selling to the Federal Agencies and certain states under P.L. 106-50. However I wouldn't think that would help an art and antiques business although I'm sure they buy some of those items.

Your also eligible for a Patriot Express Loan through any bank signed up under the SBA lending program. SBA, SCORE, PTAC and SBDCs also make special efforts to assist Service Disabled Veteran Owned Businesses (SDVOB) so just google any of those and add in your state or city location.