I spent a few months looking for a drilled tank, they seem to be in very short supply these days.
But after years of procrastination, I did finally drill my first tank this year, it was so much easier than I ever thought it would be, and I am not a DIY guy at all.
EDIT: But there are other options available to you"
1-Some LFS's will drill it for you at a small price, like $25 per hole for example. The problem is that you need to bring the tank to them and then bring it back to your place, which is added risk to move the tank so much. And of course there is no guarantee.
2-If you live in a city with an online reef club of some sort, you can ask if someone is able to drill it for you. Most of us are nice and very happy to help each other if possible