Responses from dill

Recommendations on integrated amps
For your application, I would consider: used, NAD, Marantz, Luxman, Rotel and Yamaha integrated amplifiers.  
Modern Speaker switch for use with banana plugs
This one looks good. https://www.amazon.com/Speaker-Selector-Switch-Switcher-Audiophile/dp/B07KMGVYZ6    
RCA Phono Interconnect Under $400
I addition to your choosing your tonearm cable, I found when I had a  Jolida JD-9, it benefited from using silver interconnects (to the amp), an upgraded power cord, installing damping material to the inside of the chassis, removing the tube shiel... 
**Advice Needed**Damage To Imported Speakers**
Take it to a cabinet shop as suggested above.  
A Few Nice Words For Upscale Audio
Not surprised, Kevin has been in this for a long time and knows a thing or two about customer service.  
A Few Nice Words For Upscale Audio
T+A Criterion T100 speakers. Checkout my AudiogoN profile.    
A Few Nice Words For Upscale Audio
I've had a Pathos Classic One MK lll for over 7 years and have no desire to change, very quiet, plenty of power and lots of inputs. In my opinion, it sounds great.  
Would you buy a pair of speakers by just looking at the measured freq. response?
No, almost a meaningless stat.  
Vinyl Records - Shipping, max/min temperatures
I would consider strapping them to a pallet, surround them with heavy duty clear plastic wrap and ship them freight. Cold weather should not be a problem, however hot weather might be. https://www.cratersandfreighters.com/    
Vinyl Records - Shipping, max/min temperatures
btanchors - How large is your record collection that you will be shipping?  
How do i connect preamp rca to amp xlr
They have XLR to RCA and RCA to XLR adapters. XLR RCA    
What to do with dead equipment
Contact the head BAT, Victor Khomenko over at the Audio Asylum. He is very active there and should be able to help you.  
Extension cord advice
It all depends on if you can hear it or not. Try plugging the turntable & phono preamp into an extension cord only and see if you can detect additional noise. Depending on the design & quality of your preamp, it might be dead quiet with ei... 
Extension cord advice
Here are the only advantages over an extension cord. 6 outlets that are circuit breaker protected and EMI/RFI noise attenuation.  
Extension cord advice
Are you using a Furman extension cord or a Furman conditioner? If just a cord, since it is just for your turntable & phono preamp, you don't need a heavy gauge cord. Just get a lighter gauge cord (maybe shielded) that will please your wife.