1. In colloquial speech, they are often used interchangeably.
However, in using "It was awesome.", you might be describing your own reaction at the time to what you saw, whereas with "It is awesome" you would probably be talking about the place itself (assuming it still exists!).
If the place no longer exists, you should also use "It was awesome."
Thank you. I think that the word 'housing' instead of 'house' would be right or more preferred (I thought that is what you meant) but I don't understand why it has to be 'housing, clothing and food'. Were you trying to parallel all three elements in terms of the structure? If so, is that that necessary?
No, regarding the phrase 'housing, clothing and food', I was simply pointing out that a native English speaker would say 'housing', and not 'house' here.
However, I wasn't intending the phrase to be read in isolation; it should be read as part of your original sentence.