As others have said, a "Good Trip" is subjective to each of us.
The cheapest trip we've ever had (family of 5) was about $1,200 (we had annual passes so this was for hotel & food). Our normal trip costs us between $2,000 & $3,000 (because we already have our park tickets).
Our upcoming trip will be our most expensive, here's the breakdown so far.
Airfare -$1,300
Ground Transportation - $600
One night in San Diego - $300
One night in Hollywood - $670
Seven nights in DL - $3,333
Five PAP's - $2,195
SeaWorld Tickets - $148
USH Tickets - $275
Food (all meals, including 3 character meals and fantasmic dessert) - $1,800
Souveniers - $1,000
Total $11,621
One of the character meals and fantasmic dessert will be for 9 people, not just my family of 5. If I can manage to get into Club 33, then the price of this will go up about another $800 and I'm still undecided about what to do for WoC (meal, picnic, or fastpass).