If this is for your proposed plan in years to come, I'm hoping some eco-boffin will have solved the issue for all of us by then. Who knows, you may be heating your house with it!
The old-fashioned way of moving manure (and in keeping with your 1800's theme) was by horse-drawn cart. You could skip the stalls out into the cart and transport it away from the house to a more convenient location if it really concerns you.
However, I agree with Bkylem in that your guests (even the non-horsey ones) will most likely be expecting the sight and smell of a dung heap - all part of the experience. My boss runs a successful B&B from the beef farm I live on. If visitors arrive unaware that cows bellow, poop where they please and smell a little funky . . .well, they sure know better by the time they leave