We are using propane surrounded by our alien house for heat and hose. How various gallons are usually used a light of day? ...

There's a strange smell contained by my house...?
Answers:    no way to know for sure - you can grasp an average by making note of what time it is filled and hang on to track of how many days it last.
Which is cheaper on my electric bill?
If you have a small nearest and dearest and live in a moderate climate I would read aloud a 1500 gallon tank will end 3 months in the winter. next to another 1500 gallon fill up required for the rest of the year.
If your luck is resembling ours it runs out on the coldest day and everyone elses does too. A nice Cast iron pot belly stove is a suitable backup.