L322 TDV8 purchase help

Hi all, I’m considering buying a 2007 tdv8 vogue with approx 80,000 kms.

The price is within my budget and it appears to be a good deal, but I’m concerned with the following facts:

It’s been sitting in storage for 2 years, the suspension understandably has sagged and the battery is completely dead. I am trying to get the seller to buy a new battery so we at least hook it up to see if it will start up.

My concern is, is it safe to drive it to a mechanics shop with all the fluids sitting still for 2 years?

What are the main things I should look out for when going to see it in person?

Assuming the engine is good, what’s the ballpark number for a new air suspension set?

Lastly, as I have no experience with diesel cars, what are the big ticket items that break down on it?

I will try to bring my own mechanic with me to see it up close.

I am fully aware of the money pit i am potentially getting into but I feel it’s part of the RR experience 🤷🏻‍♂️🫠