Heat gun Yes that one will work it reads over 500 deg F.
The conveyor dryer will save the school money in the long run if they plan on selling shirts. Mine has an 8 ft curing tunnel and will do 400 shirt/phr
But I can see your dilemma trying to convince a school that spending money is making money in the long run.
Heat presses they are like any thing else you get what you pay for. the cheap one will work but who know for how long.
This is the one my wife and I just bought to replace our old clam style.
http://www.stahls.com/fusion-heat-pressThe slide out pallet work great and really speeds doing numbers and names on jersey but would be a little over kill for what you need.
Doing the print you described on royal shirts you will need to under base the whole design then flash most likely print the white under base again
flash then print the top color in this case gold. Then take the shirt off the pallet and put it on a table or ironing board and do the final cure.
If your gold is High Opacity Gold ink you may get away with out under basing the gold