Ok, one last attempt at making this clear, then I'm joining Patio on his week off
know I had at least that much that i could use.
That's the whole point, Squall. The fact that you had in mind the amount of money you could use to start with means you had a budget, or in other words, an estimated amount of money that you could spend on your computer.
budget /ˈbʌdʒɪt/
–noun
1. an estimate, often itemized, of expected income and expense for a given period in the future.
2. a plan of operations based on such an estimate.
3. an itemized allotment of funds, time, etc., for a given period.
4. the total sum of money set aside or needed for a purpose: the construction budget.5. a limited stock or supply of something:
his budget of goodwill.