when you don’t have the resources to get better alternative cheeses, learning to use hummus or tahini+mashed beans as a cheese base can be really handy. as well as knowing what spices make a ‘cheesy’ flavor (such as: garlic powder, onion powder, chives, paprika, chipotle chili powder, cumin, dill..) and experimenting.
You can use this thick cheese sauce for making grilled sandwiches/quesadillas or use it as a dip for crackers and chips.
also avocado, coconut milk, and nutritional yeast are also great additions when making cheese sauces. you can make a nice alfredo using those three ingredients + salt, pepper, onion, garlic, lemon juice..
what I’m getting at is that you can make simple, affordable and really delicious cheese sauces with what you have access to! don’t be afraid to experiment - look at different vegan cheese recipes and see what kinds of stuff they use for bases and seasonings and make your own version with what you have!