Good to see progress on the rebuild HXsman, and that you were brave enough to share the pics of the RUST.
I'm doing a similar resto with my HQ van, time wise its been 4 1/2 years and getting close to the paint shop stage.
Cost wise rule of thumb is what you reckon its going to cost double that and add 10%.
The best part is going to be reassembly after painting, the enjoyment over rides cost any day.