Hail Ceasar - Movement Tray Help

Hey everyone,

I'm basing my infantry individually on 25mm round bases for use in various game systems. For Hail Caesar I see people basing something like 4 to a 40mm square, and then arranging those squares for formations.

I'm looking to keep things simple and affordable, and have found 5x2 movement trays at a reasonable cost that fit the guideline for 150mm frontage. Is there any reason not to just get those? Is ten models per 'battle line' unit too few? I'd just use two trays connected longways for my pike blocks and warbands.

Cheers.