Look, here's the thing: spices can be pricey. I totally get it. For some tiny jars of garam masala, turmeric, and coriander, you could easily be spending $12-20 alone. ("Well then why don't I just go to a restaurant and order this instead, Jeremy?" Yeah, I bet you're real fun at parties.) Listen, these are some great spices to add to your arsenal, but hey, if you have to stray--I'm not opposed to you buying a seasoning packet of chicken tikka masala seasoning mix like this one here: https://www.amazon.com/Simply-Indian-Essentials-Chicken-Seasoning/dp/B00H5QPD8G
It's a wonderful substitute if you're on a budget crunch. You can probably find a packet of this at your local grocery store for under $1.