Some minor free advice --
Consider the use of Log Periodic Horizontal antennas for transmission, as in
this example:
http://cbc.am/cbc-src.htm
-- For SW power at or under ~5 kw, dipoles -- as in MW transmission are
fine -- so long as their hights do not exceed 49 m.
I do consluting work:
http://hireme.geek.nz/sw.html
I have done consulting work for this religous broadcaster:
http://cbc.svserver.com/
Yes, a license, too. But this would be setup as a missionary radio
station in remote villages of third world countries.