@Heather Hall rental rates for the home could be found by looking up similar homes (though comps may be tough due to its size and the land its on). What I can tell you is the economy is strong here in COS and seems to be getting better all the time. If you've lived in the house 2 of the last 5 years you could sell it and not have capitol gains (I believe, check with someone much better equipped in this area than I am).
With that said, everything I have seen and the research I have done is saying this: the market here will likely remain strong for the next 4+ years. Even if we could double the houses being built, we still wouldn't have enough housing for the expected inflow of people. The front range is expected to double in size by 2050.
All of this to say you're in a great market. If you're looking to get into rentals, maybe a better idea is to start a little smaller home wise and cash-out refinance the big house to buy 1 or 2 smaller homes to cut your teeth on? Personally, I'm buying when I can (currently working through a new rental deal) and will continue to do so. What is it that you are looking to gain from your rental? Knowing why you are doing it will definitely help decide what path to take.
Congrats on having a fantastic property and let us know what you ultimately decide to do.