In my experience, paint + primer-in-one is the biggest lie in home improvement, a close second to one-coat-coverage.My renovations are typically turning old, well-lived-in houses into hardened rentals.

Here's an old thread with hundreds of responses and many good ideas:  https://www.biggerpockets.com/forums/52/topics/68041-how-do-you-harden-your-rentals

So for example I'm very conservative and don't want any debt on them because I feel this hardens them in case of a severe recession.

1/4” drill bit and a drill will get you in, unless it’s a higher end schlage some of them are hardened or have a hardened plate around the knob.

At the kitchen, we will patch accordingly and may use floor hardener. 

Unfortunately, factors like a hardening property market, inflation, labor shortages, increased building costs, and an increase in claims frequency and severity have caused our carriers to require increases to both rates and coverage amount minimums to keep up with these market conditions.

This will not be the last, as you know, but, as the network is hardened it will be better prepared to readily fend off future attacks.You have credible support staff and vendors to help resolve this issue, so we are not worried, it's only annoying.These hackers/pests will not go away unfortunately and have nothing significant to add to the betterment of mankind other than misery.

.- paint- trim- very light demo + dumpster- trim, a little flooring fix, commonizing the look and harden it (bath fans, remove storm doors, put fake bottoms in sink cabinets, add a tub grid drain, etc)- spring will need some concrete.that's it.

That stuff is junk.Here's another trick for hardened walls.

I generally look at rental properties that are already hardened up as a plus.