Halloween // Need cheap halloween decor options and ideas!

I'm 15 and live with my parents and 2 brothers who aren't as dedicated and excited about Halloween as I am. I want to buy some really good Halloween decor for inside and outside. We have a decent sized front yard and I wanna fully decorate it but I'm broke and I'm too young to get a job until October. I don't wanna make my parents have to buy the decorations because money is tight right now and I don't like making them pay for stuff. I have a small baking business but the income is very low. I got some kinda good decorations from the 99 Cent store last year that I gave sfx upgrades to and I heard that Dollar Tree has some good items, but are they good quality? Individual items can't cost more than $10. Any tips and ideas are appreciated! 😊