I think TPS is the way to go because going college till today's date after spending a decade already I felt like I am career student without a penny in the bank. So TPS is big time relief. Enjoy it And keep working on your greencard. Even if it doesn't work out you can come to F1 status after the TPS expires. 18 months of relief & hopefully more. The money that you would spend could be used for later immigration issues if you happened to have any.