"Cleanliness is next to Godliness"
One of the most common complaints from travelers is unclean or unsafe facilities. Travelers want stalls to be well built, clean, and the stalls and facilities should be secure. Most travelers prefer covered stalls for protection from the elements, if possible, although, depending on the traveler's tastes, that is not always a necessity. If you can offer such things as a wash rack, turnout arena, barn stalls, hay for sale, etc., it will help but isn't necessarily a requirement. Some travelers like to camp out in their trailers so some empty space might be used to accommodate trailers. Campers are usually self contained but electric hookup and/or a garden hose might be appreciated.
Whatever you have to offer, advertise it accurately. Don't embellish! Be honest. You may lose some business to travelers who need more than what you can offer but you won't lose as much as if you aren't forthright in your representation of your facilities and the traveler relays their disappointment to others. Shavings, while appreciated, are not always expected, but a clean stall with no manure in it is. Property should be free of hazards to horses such as boards, nails, wire, sharp objects, etc. Stalls should be large enough to accommodate full size horses (12' x 12' or larger is preferable). Prices charged vary and range from as low as $20.00 per horse per night to $50.00 per horse per night. That is a personal matter and, generally, the more lavish the place, the higher the price. If you feel you offer a "Motel 6" place, it probably would not be a good idea to charge Hilton prices. (Both places are nice, just different for different tastes and budgets).