However, adding a para position now could be a stepping stone to a full-time position later.
The para contract could be structured so that their official working hours are, eg, 10AM-6PM so they come in late and then stay after school. Or flexible hours, as long as they make their 40 every week. This could allow hiring a grad student who could schedule classes around work.
I've seen a district hire a percussionist as an hourly para, but with the understanding that they'll be clocking significant overtime. One percussion instructor I know made more than the head director during marching season (it balanced out later, but still).
There are ways to do this that are fair. If the option is a para position or no position, I know what I would choose.