I'd simply suggest going the good way to get a better long term result. If you do practice Work some luck, opportunity and needed wealth. mix in some hard work there also. Im most places you can hold down an apartment on your own with a job, this will not allow much spending room. Your 23 and single. There are many individuals around your age looking for room mates to cut the cost of rent. It is not realiable but a choice.
Then there is the choke hold. They can not physically stop you from your own ideals and beliefs unless they finance them. To live under the roof I can suggest going over the budget to see what you need to contribute to earn adulthood under her roof. A rent, utility responsibility and grocery contribution. For rent and utility you are going to have to pay a set percentage. if there are 2 people 50% 3 people 33% and so on. With Groceries take an honest look at what you eat and pay for it. This is something you have to sit down and make a contract for even if it is just on a piece of lines paper. For your and her benefit.
I do not know you exact situation so this is the best I can do
As for a spell. It is better to develope a spell that is filled with aspects you believe, but if you have the ability to believe in a spell that is not personal I can write one based on what I can pull from your message. Let me know if you are better with simple or complex and a brief description of your beliefs so I can better tailor one for you. You'd give me a good enough idea if you let me if and how you cast your circle.