Does this look reasonably close to what you’re trying to achieve?
I get that but there are problems related to the way you’ve drawn circles off axis. That’s part of the reason things have gone pear shaped. Starting over would be a whole lot easier than repairing the model as it is.
That’s not a bad thing to do. Personally I would start the model at the size I want it to be. I would make components of parts of the model and then use the Dave Method before doing things that might create tiny faces that would cause problems.