I am not a travel agent but my partner is. I see a small problem to contend with. When you work in a shop you do get a lot of foot traffic through the door which turn into sales. The way round this would be to possibly target business clients then this would eliminate this problem as they just phone and say get me there at this time. Also if you were willing to make out of hour visits to a persons home you could take the brochure and computer to them, a very personalised service.

hope these ideas are of help