I don't see many numbers on that website so it doesn't seem very credible.The unihab apparently has a 36 meter diameter but is delivered "as a singular cargo module by a Xeus lander", which has a 10 ton maximum payload. With a ceiling height of only 2 meters it would be similar in volume to the BA2100, a habitat with a more mass-optimized shaped which is estimated at 70 tons.There are no mass and power estimates for the 15 meter centrifuge, this element would be extremely difficult to fit and mostly useless. For the first missions you could just use crew rotations similar to Mir and ISS, there is no good reason to believe that 1/6g would be worse than 0g.