Hi,
Multi-dipoles work fine as long as the freqs are not harmonically related - keep in mind that you will probably have to trim them to slightly different lengths from the calculated ones as they do affect each other.
FWIW, the State Dept. uses a lot of T2FDs on their consulates and embassies - no trimming or expert calculations involved..
If you can get 'em to buy an auto-tuner, there are lots of possibilities.
Hartley