When I have had your situation, Autoslash has worked with me one-on-one. I'm not sure they could sustain that if they become as successful as I hope
That said, and a suggestion for Autoslash's future IT design/re-designs, on the
www.autoslash.com/quote page it would be nice if there were an "Advanced Options" section that had tickboxes for things like the following
NO cars from [tick box for each company you won't rent from]
Need no fee for under-25
Need no extra driver fee
etc.