Not just no, but hail no.
3 16 hour days is 48 hours, is only $25/hr. Or less than my day job's take home (and by a goodly stretch). It's 1/7 of my "bill rate" at my job, come to cases (those dollars have to fill a lot of rice bowls, though).
Let's consider a short and simple BB, Oregon, for example (ok, it's not 1/350 per se, but serves as an example). I'm not sure you could get that 15-17 inch long kit primed, dried, sanded, and finished painted in 3 days, even straight OOB.
Base, stands, and case, too? De ninguna manera, José, Estas muy loco.
And, of course, the shorter, earlier BBs are not "simpler" either, to confound and vex. An RN "Monitor" with only the one turret still winds up with a multitude of smaller guns and assemblies to build up and detail. Even Dreadnaught, with her simple, clean set up has close to a solid day of nothing but turrets, endless turretes.