No problems. And as I said, why don't you try hiring a lens for a week. You'd at least get a feel for how it works ir not for you.
I've never used them, but heard good reports about these:
http://www.lensesforhire.co.uk/canon...-usm-188-p.asp
Oh yes, if you are thinking of going down the full frame route at some point you need to remember that EFS lenses will not work on full frame bodies.
Finally, just to let you into my day today. Started at 7AM French time. had about 30 minutes for lunch. Worked again until 4PM which is when I had to look after my daughter. Started again at 8PM with 4 videos to redo plus a few emails to send off.
As i said before, just keep in mind "this" side of the job!