Still not sure how that matters. Horses are absurdly overpriced in D&D economics - a farmer would have to work by hand his entire life to be able to afford a pony. It's absurd and fallacious to assume a carriage is used indoors, as well - indoor movement is what adventurers are tuned for, short bursts of activity and high athletic movement because someone is trying to stab you.<br/><br/>You are suggested that Olympic sprinters are automatically going to win marathons. They're entirely different muscle-related skill sets. A typical adventurer is a sprinter, trained and conditioned to spikes of exertion with relatively low-level activity in between. They're not endurance hikers, unless you've specifically splurged for the Endurance feat; 10 hours of walking is a lot. Camping overnight almost doubles that travel time. A carriage is also not only less stressful, it is faster. 5 hours, assuming the carriage is pulled by horses, delivered us in half the walking speed time (1/3 with the overnight stay) and prime fighting condition for anything we meet at the other end.