BS”D:
1: There are many Talmidai Chachomim who make parnossah as mashgichim, etc. over Pesach, and that is a main source of income. I would argue that going to hotels IS an act of Tzedaka (giving them a job) and a Mitzva, even excluding “Simchas Yom Tov” (Begadim vs. not having to go crazy cleaning & cooking, anyone?). There is no chiyuv to lose output by giving to others, if anything it is better to work for it (Nedarim 49B).
2: As far as Yanky’s comment about chomesh, there is a reason why the gemorah disagrees with you (with specific exceptions), even in “bad years” like we have now. B”H the money is NOT needed for people to survive (unlike the collections made during WWII on Shabbos, for example). Before being so sure, ask your Rav.