A few facts: Not trying to throw water on your fire here but you are up against the physics of getting heat from wood and then transferring it without losing half of it in the process. The laws of physics do not bend for anyone.
There is no such thing as an efficient outdoor wood burner. Not bashing them or anything like that. There is just no such thing and never will be. Heating equipment should always be installed inside a conditioned space if you are concerned about efficiency.
Any outdoor wood burner is going to be to large for a 1000 square foot structure and will idle a lot which will reduce what efficiency there is even more.
When you factor in costs for a correct and efficient installation, you will find that any new indoor boiler is going to set you back $7,000 to $10,000. That being the case your honest payback is going to be down the road at least 5-7 years given the fact that there will be maintenance and ongoing expenses with the boiler, pumps, controls etc etc. This makes weatherizing and insulating your house a much more "appetizing" way to go because you spend the money one time and you're done.
If at all possible, I would look into a small indoor wood burner or a pellet stove. If neither of those can be done I would tell you straight up that you are not a good "candidate" for burner wood if you were my customer.
Next on the list would be to investigate buying your own LP tank which will allow you to shop around for best pricing on fuel. If you can find a used 1,000 gallon tank you could probably get by on one fill for the entire year. That would allow you to purchase your fuel during the off season, May through July, at prices that are substantially less than in season rates.
Without knowing the entire scope of your house layout and other factors, I'd say a good quality pellet stove would be the best way to go for you. Don't buy one from the likes of Lowe's,HD, or a farm supply store
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! No parts when you need them. Ever. No service when you need it. Ever.
If you can find a dealer for Ravelli pellet stoves, that is a good one.