Building greenhouses by yourself sucks. I usually do them with my one homey but he had some personal shit going on. What we can do together in 2 days, takes me a full week. Got plastic up and ladies in. Got it all ghetto rigged just to get them in.
For the pellet stove. Installing is pretty simple. Do it like a house kind of. I built a small 2x4 box so I could hook up the wall thimble to it. You just need a regular old pellet vent kit for a house, 2x4s and some osb. I have a solid north end wall so it's easy to mount the box to the endwall. I will do an auto light dep thread building a 20x60 after this one is done. I'll share some pictures today of an auto.