I am glad you have heat now, although it isn't exactly the type of heat that you had wanted.
When we built our new detached garage we wanted it to be heated, and we wanted to heat with natural gas. We have natural gas going into our house for the furnace and the water heater, and we thought we could tap off our existing gas meter and run it to the garage. But it is all concrete around where the gas meter is, so we would have to branch off the gas line in the house and then run a new gas line out thru a wall, bury the gas line out to the garage, then bring it back up and into the garage.
Then too, the gas line running from the meter to the house wasn't large enough to handle the needs for the house and the garage, so that gas line would have to be replaced with a larger one. All this could have been done, but it isn't real cheap to do, especially when you hire someone to do it. I imagine I could have done it myself but it would have to rent the equipment and then hire it checked to be sure that the work meets all the local codes. The last thing I would want is to do something wrong and have to do it over again, or worse case scenario, blow up the house or the garage and us along with it.
Anyway, the cost would have been quite a lot to branch off the existing gas service, so we decided to have the gas company run a new gas line from the street to the garage. They will run up to 100 feet for free, but then you have a pay a meter charge of not quite $10 per month. I suppose $10 doesn't sound like a lot of money, and I guess all things considered it really isn't, but when you think about it, over the long run it will cost more this way than to branch off the existing meter. But that thinking also assumes we will live here for a very long time, which may or may not be the case. If the wife and I should decide to sell the place in the next few years and move to a condo someplace warmer, then I doubt we would really care about whether or not it would have been cheaper in the long run to branch off the existing gas line.