Any thoughts on how much it'd cost to restore this rig?

People start projects like this and never complete them due to financial, health and/or family issues. Do you really want to spend a year or more working on this old rig or do you want to buy and start using an RV. Is your mate in favor of you spending a lot of time on the project and patient enough to wait for the outcome and finally enjoy RV'ing in the rig?