DLR no longer offers a 6-day ticket, the most number of days you can purchase is 5 days. You would need to purchase an additional 1-day ticket if you insist on 6 days in the parks. If money is an issue, take a day in the middle as a "hotel" day, or take Anaheim Resort Transit to Knott's Berry Farm, which is pretty fun.
The biggest cost savings is by staying off-property. DLR's hotels are all deluxe level, and are (over)priced as such. There are numerous hotels and motels within walking distance of the resort, and dozens more are serviced by Anaheim Resort Transit (which is no different, other than additional cost, than the bus system at WDW).