I'm not sure you'll ever be totally happy with your boiler selection-not the brand, but the size.
I had the Pro Series 100 from Empyre for one winter. I loved the way the little thing functioned, but the firebox on it was just too small to heat my home and DHW without stuffing it to the gills 2-3 times a day. I think it only held 5.5 cu/ft of wood, and by the time you took into account the left over coals/ash while reloading, as well as when filling you will never fill every square inch(pieces too short and irregular shapes), I always figured I was lucky to get 3.5 to 4 cu/ft stuffed into it. When it was below 20* I almost always had to plan on a 10 o clock visit to the boiler to get me by until 6 in the morning.
You are heating about a thousand sq/ft more than me, and your boiler only holds .5 cu/ft more wood than my old boiler. Unless you are able to super insulate your home and control a few zones when not in use, I can't imagine that unit being big enough.
Size sometimes definitely matters. To put primary burn chambers in to perspective, Central boiler's smallest E-Classic, the 1400, has a burn chamber that holds about 14.5 cu/ft. Realistically, we can expect to be able to stuff them to about 70% of their total capacity. CB's baby boiler at 70% will hold more than 10 cu/ft of fuel. At 70% with yours(6 cu/ft), you'll only be able to jam in about 4 cu/ft. That, my friend, is a huge difference!
I wish you the best of luck! If you continue to have issues with burn times, I'd bet that your dealer could convince the powers to be at Pro Fab to swap your unit out with the next size larger unit. I'm sure you'd have to spend a few grand more to do the swap, but you'd have a lot less frustration and more peace of mind.
Your dealer should have never encouraged you to install a unit that small for a home your size.
I just googled Harrison Arkansas(don't know where you are at). It's 10 degrees there right now! That's 3* colder than it is in central Michigan where I am.