What would you recommend for a natural looking enhancement? Realistically how long is downtime? (Photos)

You did not specify what surgery was recommended to you, so I cannot answer your questions in that regard. However, looking at the photos you shared, I can tell you what procedures we would recommend:
An endoscopic browlift to address your brow ptosis
Bilateral upper blepharoplasty with ptosis repair to remove excess eyelid skin and raise the lash line so you do not look quite so sleepy
Bilateral lower blepharoplasty with lateral canthopexy and fat transfer to the tear trough to remove excess skin from the lower eyelid, improve eyelid support, and address the hollowing at the lid-cheek junction
Facelift to elevate the soft tissues of the midface, soften the nasolabial crease, treat the signs of early jowling, and deliver a sharper jawline
Necklift to address the platysmal bands and tighten the redundant skin of the neck
Rhinoplasty to correct your drooping columella and bulbous nasal tip
All of these procedures could be performed concomitantly if you wished. Surgical time would be about six hours. Or you could have them done in stages, if you preferred. You would be out of bed and walking around in about a day or two after the surgery. You would be ready to appear in public about two weeks after the surgery. You would be ready to gradually resume exercise about six weeks after the surgery.

Facelift surgery can look bad and unnatural if it is not done well. I advice that you discuss this with a surgeon in person and ask how they avoid unnatural looking results and ask specifically what their approach to your face will be. Ask them what they think a good result is and what a bad result is. Looking at before and after photos with your surgeon is a good idea as well.
Based on your photos you are a good candidate for a facelift surgery with a neck lift.
After having a face lift it is recommended you have an adult with your overnight unless you are staying at the surgical center. We see our patients back in the office the following day to assess how they are doing. Close follow up is necessary to catch post op complications early. Vigorous exercise can be started 6 weeks after surgery, however you should be up and around right away and likely will be out for walks by about a week. Going out in public depends on how bruised you become. A week is usually sufficient if you don't mind using a scarf or turtleneck and sunglasses, however you may be bruised for a few weeks.
You can continue Botox with facelift surgery. With respect to fillers, if you are planning a face lift, you could stop them now. The soft tissues will be adjusted with surgery and you can make a decision with your practitioner 3 months after surgery as to whether there are any areas that can have the contour touched up with filler after surgery.
All the best to you,
Dr. Nancy de Kleer