Cost is always a factor to consider especially if budgets are tight
There can be a temptation to ask a well intentioned friend who is a keen photographer who will do it for nothing or a few drinks on the day, so what could go wrong? In most cases I am sure everything works out fine, but you could get some very bad pictures or worse still no pictures because of technical problems.
It is very tempting to save costs and agree to a friend to take your wedding photographs, but before you do this you need to take a step back and ask yourself some questions:
What will I do if there is a problem and I don't get any wedding photographs?
What will I do if I do get some wedding photographs, but I can only use a few because the rest are out of focus or wrongly exposed?
What will I do if the friend has a problem and can't make it to the wedding?
Has this person ever photographed a wedding before?
Does this person have a professional camera?
As I said earlier, in most case everything will be fine, but the last thing you want on your wedding day is added stress and worry.
On a final note, wedding photography can and does go wrong if you don't do your homework as per the example on the this this link to an article in the Daily Mail.