I don’t have the actual square footage, but it’s a good 12 ft by 40-ish ft on the lower deck and narrower but longer on the upper balcony. No small task. We’d have to rent all but the shop-Vac.
My position is that it’s too big a job for not so young people with demanding full time jobs. I wanted to confirm here that it’s not an easy thing you can do in a weekend or two.
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That's a Big Job. More of a take some Time Off from work type Project if you want it done Start to Finish Uninterrupted. LOL.
If you going to Re-Paint, and the Condition of the Deck is Fair to Good, Sanding would probable be the Best way to go. You can Rent something like a Belt Sander from Home Depot for like a 100 Bucks a Day. But for a Project that is going to Require more than One Day of Sanding, or where you might want to do 6 Hours here and 6 Hours there over a couple of Weekends, it will be Cheaper to just buy a Mid-Range Belt and Orbital Sander.
You really only do Chemical Stripping when you Need to get All the Way down to Bare Wood. Where you are afraid that a New Paint won't stick to the Old Paint/Surface. Or when you want to Stain and the Clear Coat.
Doing the Flat Deck portion Usually goes pretty fast. It's the Railings that will soak up a Lot of Time.
If you could bring in a Bunch of Friends/Neighbors and do a old style Barn Raising on it, doing 900 or so square feet of Deck might be doable? But for a Working Couple, just doing it on Weekends, that's going to be a Choir.
Something to consider would be Find Out what a Crew would charge you to just do the Prep? Then consider doing the Painting Yourself. Two People could Paint a 480 square foot Deck/Rails in 2 Days. Probably a Single Day if they kept the pedal down. The Prep is Always what takes the Time in these Projects.