My wife and I are looking for a storage shed and don't want to get into a lot of investment. We saw the Thinking Outside sheds at Sams and really like the larger model. Our concerns are first in a good anchor for the shed (I assume that depends on the amount being stored in it, however we live in Oklahoma and it gets really windy at times) and second is the shed's ability to seal out the weather. We noticed several areas where water could get in. Would it be advisable to spray some type of extracting foam to seal these up?