You may want to talk to several heating contractors to find out what works well in your area for your intended use.
Forced air and hanging radiant heaters can warm the air in a building quickly. In-floor heat is slow to change the temperature in a building because the concrete floor must be warmed first before the building warms.
How do you intend to use the building? Will it be occupied 24 hours a day so it can stay at a constant temperature, then in-floor heat is fine.
If the building is unoccupied for long periods of time you can reduce heating costs by reducing the building temperatures when it is not in use. Then hanging radiant heaters will be better because the building can be warmed up much more quickly. Timers can be used to warm the building in advance for regularly scheduled meetings and training excercises. The heaters could be programmed into the fire alarm system to kick the heat on when a fire alarm is activated.
If you do maintain a constant temperature extra insulation will pay in the long run. Big roll-up doors with big windows are hard to insulate.