While I have yet to purchase one, a planer/jointer combo is on my shopping list and I will likely pull the trigger sometime in 2022. I have spent a considerable amount of time researching similar units as the Jet (price point $3,500-4,500) and my impression is that the Hammer A3-31 (Felder-Group) is a great unit to consider. As with you, shop size is a consideration, and I don’t have room for separate units and I have read multiple times that the Hammer helical head (Silent-Power spiral head) is amazing. As for the Jet, I have read reviews that the build quality and casting are somewhat lacking. However, as with current supply-side issues, its going to be sometime before you get a new machine delivered. Felder’s website says 7-9 months and from what I’ve seen for the Jet…it looks like early Fall.
There have been plenty of posts on this site regarding the Hammer and many of the youtube woodworkers appear to be big fans. “Bent’s Woodworking” channel recently did an unboxing of his new A3-41 (this guy is apparently living the dream...while in Army, he is also buddies with Sedge, sponsored by Festool, etc).
Again, disclosure, I have yet to purchase one…