Ring Design help

Hi, I’m new to jewelry making. I have designed an engagement ring
that I would like to have made. You can see a drawing of it at:
Yahoo | Mail, Weather, Search, Politics, News, Finance, Sports & Videos My questions are:
I would like to have the diamond and the 2 pyrope garnets tension
mounted, but having no experience in designing rings, I don’t know
if my design will be strong enough to do that. The ring is to be
made of titanium or platinum. Next, would I save very much money by
making a wax model myself, or should I just take the design to a
shop and have them do it. I want to be sure that the ring is done
right and will last a lifetime. Finally, how much should I expect
to spend for a ring like this? Thanks for any help. You can reply
to me directly at: @Steve_Warden or just post to the list.