Help! Advise needed on servicing an inherited watch

[Ahslan]

Hi guys,

I recently inherited my wife's grandfather's Oyster Perpetual Date ref. 1550. The watch had been sitting in a safe for years after his passing and I have no info if the watch was ever serviced. The watch keeps time very well (was +7sec when I wore it for a day) but to play it safe, I sent it to a watchmaker highly recommended here on the forums. Now I'm faced with the a really tough decision. The quote I received was $2400 which could vary a little depending on the condition of some items after the cleaning. I was immediately taken aback since I was mentally prepared to spend close to a thousand but never thought it would this much.

The cost seems to be really high due to needing to replace the crystal, cyclops and the gold crown which combined, seem to amount to almost $1100. There also seems to be a substantial cost difference between just replacing the mainspring and replacing the mainspring and barrel together. I really want to ensure that the watch runs for another 40 years and is something I can pass down to my kids, however, unfortunately, I'm currently not in a financial situation to spend this amount. The good news is that it looks like I have the option to pick and choose what I would like serviced (for example, have the movement cleaned and lubricated but not replace crown) so wanted to see if I could get some help on recommendations (unfortunately if I go down this route, I don't really get the warranty provided by the watchmaker)

So far, I'm thinking of proposing the following but curious to hear your thoughts.
-Normal service (clean, lubricate)
-Replace just mainspring

I'm also open to the idea of just getting the watch back and waiting until someday I'm in a place where I can afford the proper full overhaul.

Thanks in advance!