Chagigah 8: What If You Don't Have Money for a Lot of Sacrifices?

What monies can be used to pay for the korbanot of a festival, in particular, the Chagigah shelamim? And when you you need to lay out money, can you combine money from your own pocket with your ma'aser sheni money? Especially when you need more than one animal to feed the family. And why ma'aser behamah animals could not be brought on yom tov. Also, a mishnah! What happens when you have many mouths to feed and not much money? Or vice versa? Or little of either, or a great deal of both? Plus, can those who are advised to bring many korbanot shelamim bring a large animal instead of several small ones?