I line hatch all the time using a incubator and a hatcher. The hatcher needs to have enough room so the chick can kick out. As for chicks playing football with there un-hatched siblings you can hatch in the upright position (this also saves space) give a little room so when they drop of the top of the egg tray they can stay on the floor. Ive no idea how large a rcom is but if you are line hatching I would suggest calculating how many a day you can hatch then set eggs in the incubator to match.
Certain other restrictions also apply like.
How fast can you regain humidity after the hatcher is open, How many hatchers before a clean out, How are you going to brood.
My hatcher is home made so I know it regains humidity with in a few minutes so ive never had a problem removing chicks even when the others are zipping. If your rcom can not regain humidity with in a few minutes then you may have to leave the chicks there until the last one hatches which will mean only setting eggs In the incubator every 3 days.