Ok, hold the laughter ...ME a wedding photographer!???

[HDNitehawk]

PS You can rent a 7D for 3 days from Lensrentals.com for $70

I would do that and use your existing gear otherwise

And $15.00 more gets you two 8GB cards. Then you have enough memory. You will make the $85.00 in just over an hour to pay for this. Not enough down side here to back away from the job.

The lesson here is this, next time you bid a job you will know to put an adder in for this extra small expense. Dozens of ways to do this next time, charge an equipment fee per hour, add to your hourly charge. Charge a fee for set up, with an explanation that it is for additional equipment you need.

You learned the lesson because you took it this far. Imagine what you will learn if you continue on with this project .