yeah, in his latest interview to Famitsu (yesterday), Yu also said that basically he funded with his own money YsNet at the beginning only because he wanted to make his fans happy with Shenmue 3. What many people don't think about is... Yu Suzuki basically quit working in the early 2000s. The man is rather wealthy (I think royalties from his past games or whatever) and isn't interested in making more money out of games. He's returned to make Shenmue because we, the fans, convinced him :)
He doesn't care to make profits, he doesn't care to make Shenmue 3 a great success. He made a game exactly like "we" wanted it to be. He even stated that he didn't want to add the forklift in Niaowu, but some fans kept insisting about it, so he found a way to add it...
And yes, Shenmue III needed that budget at the time of the Kickstarter because YsNet had zero resources basically. YsNet was composed of less than 5 members back then, now it's 75. They had no graphic engine, now they have it. I think Yu just wants to continue Ryo's story, to complete this last saga. He's not interested in making other games and I think Shenmue IV will be a much smaller investment (the fixed capital is already there) than III.