A clean title without liens is required. It is important to have 12 months of clean credit particularly on mortgages and less so on credit cards and other revolving credit. Income - for salaried individuals, the most recent income as determined by pay stubs. Base income is used directly but variable income such as commission, bonuses and overtime must be proven for 2 years and expected to continue in the future. Assets - Proof of assets by 3 months of bank statements or brokerage accounts.
Points buy rate.
It takes time to break even on the extra money paid for these points, as much as 8 years for 3 points.