Floating Fox
Trimaran or catamaran?
We build houseboats on three rows of pontoons.
Why?
The trimaran is an a priori:

No more seasick!
Stable construction - passengers are less likely to get seasick. Roll on a trimaran is negligible while sailing or mooring in the bad weather, which means you won't feel any discomfort. Although our houseboats of class D (inland waterways) are operated on lakes and rivers, a roll in high winds does occur. But the trimaran neutralises the effect.
Great stability
The platform on three rows of pontoons at the moment of weight transfer from board to board does not lurch to the side. Suitcases, three cases of beer, a barbecue, coals, heaps of provisions piled in the corner? Not a problem! Also, you may be curious to know that we install the water and waste water tanks in the middle row of the pontoons. When you leave the pier, the fresh water tank (that's 800 litres) will be full and the waste water tank will be empty. By the end of the journey it will be the other way round. But, the platform will still be level.
Large area
A trimaran can built much wider than a catamaran, which means there will be more habitable space. The most width of a catamaran - so that the floor would not sag - is 3.5 metres. A trimaran may built wider than three and a half metres.
Large deadweight
A third row of pontoons provides a 30% increase in payload! And only an amateur might think it is not important. Walls, windows, doors, furniture, things, people - everything has its own weight, and it is very tangible. Fuel tank - 100 kg, each battery - 70 kg.
Variability in layout.
The platform design is always the same and the trimaran is less sensitive to balancing. Want to make the kitchen bigger? Take on extra batteries? No problem! It's obvious to you that the kitchen, and indeed the batteries, are not placed in the middle, right? And while a houseboat catamaran is a once-off design with an unchanging internal layout, a houseboat-trimaran is more flexible interior layout and equipment and can customised to suit individual needs.
A trimaran can built much wider than a catamaran, which means there will be more habitable space. The most width of a catamaran - so that the floor would not sag - is 3.5 metres. A trimaran may built wider than three and a half metres.