Glad to hear that you are considering the Progress Hybrid. It is an amazing woodstove and the customer service at Woodstock is just as amazing! This is my 3rd season using the PH. Here are some of the answers to your questions: As it relates to cleaning the chimney and stove, I use a Soot Eater at the end of each season and usually get between 1/3 and 1/2 gallon of creosote. It is relatively easy and you can go up the chimney versus working from the top of the chimney and roof. Cleaning the PH is easy. You will want to clean the front glass periodically (as needed) and make sure that the catalytic combustor is free of soot and dust.
Woodstock posts information on the various heat shields and clearances, so you will probably best be served by reviewing their information. If I remember correctly, the stove can be within 7" of the wall with the heat shield installed and the stove pipe can be within 6" with the heat shield installed (don't quote me on those numbers).
Regarding moving the stove, I used an Egyptian roll technique using wooden dowels and Schedule 80 PVC. We rolled it from the deck, over the threshold at the door, through the dining room, to the hearth. It went fairly smoothly. Final positioning was easily done with a automotive floor jack with wheels. Or, four big Wisconsin football players could easily move it for you
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Regarding burn times, that all depends upon the type of wood and amount of wood that you are using in the stove. Using dry red oak, I can get between 12 and 16 hours burn time. I define burn times from a reload to a minimal level of coals left in the bottom of the stove. If I use pine or hemlock, I may get 5 or 6 hours of burn time.
Hope this is helpful! Please let me know if you have additional questions.