To maybe help with your "said yes but now doesn't remember" issue I kinda went through the same thing before. We built a block pit to cook a whole hog once. I remember asking her and I remember her saying "okay" but once it was built she did not expect what was built - she was thinking something different. Even though most men would like a block pit I understood her concern about the pit in contrast to the landscaping of our yard. The thing is when you are not cooking on it - it is not a pit - it is a greasy stack of blocks.
The good thing about a block pit is you can take it down and put it back up as you need it.