Getting pre-approved from a lender every 60-90 days?

[Matthew Battistini]

For all of you active real estate investors that want to be able to pounce on a deal as soon as you find it, I'm assuming you are always in good standing with a lender and have a pre-approval letter ready to submit with the offer. Does this require you to go through the pre-approval every quarter (give or take), and what is the ramifications of a hard pull on your credit four times a year?

I have nearly flawless credit but don't want to tank it by getting pre-approved unless I have a feasible property to move on, but I feel like it's a chicken vs. egg scenario. Thanks for any insights!