I may be giving the guy too much credit by assuming he was talking about temporarily jacking up the deck and just said "post" instead of "jack."

One thing that has me thinking this is that, if you do this kind of thing for a living, you probably have more than one jack, right? So why would you even debate if you can do a 25 foot span with one jack. You'd just bring at least two of your jacks, right? It's not like there's some expense to using them. You get them back when the job is done.

Also, I spent today making a PDF to highlight the issues with the current deck for my landlord. In looking up some reference material, I found people talking specifically about dealing with poor connection to a building by installing a beam near the house in order to take some of the load off, which is what I thought they were talking about doing.

IDK, but whatever. Here's the PDF I made if anyone wants to read it.

I don't have much hope that the landlord is actually going to hire an expert to deal with the deck. So I was kind of hoping that if he at least shows the PDF to people he might hire, it'll scare away the worst of them.