So, I have never done a redo application (those are fairly new) however, we do have a redo appeal process as you've likely seen. First, you have to justify the reasoning for the redo (
Tarth redo appeal is a recent one for reference — I would copy the basic outline for that) and then once approved submit a normal project application. You do need to go through the redo clauses and select which one fits. Yours would be "evidence of abandonment," however, you might be able to find more that further encourages your case. Link to the redo rule thread
HERE.
If you're talking Fostering then a foster is
not a redo. If you're looking to foster my answer is: Don't. Estermont was abandoned before I joined in 2016. Meaning its foundation is so far out of date that updating it would be more of a headache and hassle. I struggled to update it in 2018, not to mention she has terraforming issues.
But by all means, the project is yours. I'm always glad for someone to take interest in it as I would love to see it done — it's a fun project location for sure!