My immediate response would be, "how ever much you are willing to pay!" After all I belief people own their destiny and that you can plan your wedding event depending on your budget. What the hard data says is that the average wedding costs between $10,000 and $30,000. Of course there are people who spend a lot less and a lot more than that, but that is the average price in this country. This average doesn't include the cost of a honey moon that can cost thousands more to your original budget.
For most people, who are not rich and who do not have a rich family to pay for their wedding, they are going to have to make some compromises. One major compromise is to put off a wedding until you can save enough money to pay for one. Some choose not to have a wedding at all. Others might have to reconcile their wants with their budget and that means doing without certain things that they want but do not need. Ultimately, the cost of your wedding is up to you. In some case you find websites like http://www.theislandsdj.com who offer packages specifically for weddings which can save you money.
For people who have dreamed of their wedding their entire life, their dream wedding is priceless and they are willing to do anything to make it happen. That is perfectly fine if you can deal with the consequence and price of such a wedding. For others, they should compromise and find a way to have a wedding without breaking their piggy bank.
One article did say that a wedding is the worst thing a new couple could put money towards because besides pictures and memories, a wedding doesn't have any financial rewards. Ultimately, it is up to the couple to name their adventure and do what it takes to make it happen. Of course your wedding should be everything you want and sometimes there are companies like limo service swfl who can provide great wedding packages at great prices.