Well, those are some nice looking figures. I get the large unit painting issue - even worse for you in 28 mm. My French and Indian war units in 15 mm have at least 42 figures plus another 4 casualty figures, some units have an additional 3 figures. Makes for slow painting even when just painting to a gaming standard. Somehow, smaller units paint 'faster' because you get more units done with the same amount of effort - maybe just an illusion but it sure feels easier with smaller units. 25 or so seems a good upper limit.