A monohull by comparison needs much more power to increase its speed.
Advantages of monohull boats. Most people make the mistake of comparing the cost of a similar length monohull and ignoring the performance. Sometimes equipped with an auxiliary engine the monohull is propelled by the force of the wind and keeps its course thanks to the fins located in the water under the hull. Monohulls are better weight-bearing platforms.
As the name suggests the monohull sailboat - as opposed to multihull sailing boats - is a sailboat with a single hull. In rough waters a deeper draught provides more stability and allows a boat to travel further out to sea. They point high even at slow speed.
Monohulled vessels usually dig in to the water as they sail into a crosswind. The comparison is significantly in favour of the trimaran if you compare cost per knot rather than cost per unit length. You can feel it before you leave the marina how well they pivot around it maneuvering in and out of the pen.
A monohull on the other hand can accept a much larger load before performance suffers as dramatically. Overload a powercat and most of its advantages disappear as the twin hulls sink deeper into the water and the top of the tunnel begins slamming into waves. The monohull encounters higher resistance taking longer to plane and spikes in speed and fuel consumption at mid-range.
A monohull boats deeper draught provides its own set of benefits. Advantages of one hull Windward performance keel yachts go to wind in general much better than most cats with their large keels although not all yachts have a great keel. Monohulls like this Amel 55 sail better upwind and her ballast keel adds displacement which means comfort when its rough.
As a result most coastal cruisers would favor catamarans whereas most ocean explorers would prefer monohulls. You can buy a modern 40ft mono such as a Bavaria or Jeanneau in good condition for under 150000. By comparison bow keel drag created by a monohull vessel is higher than that of a catamaran and due to this greater displacement.