Reading through this thread makes me realize yet again how lucky I am. My wife has been with me through a large portion of my career and has put up with the associated BS like a trooper. It helps that we don't have kids, that's for sure.
It would be worth the extra money. An old GPS may not have any factory support left, and if it breaks you may end up having to spend even more money to put in the modern unit you should have in the first place
I would do a gtn650 and a 175. That way they can talk to each other and you don't have to worry about reprogramming the other unit during some sort of failure.
What are you doing for a 2nd com unit? You could always do a nav/com of some sort, that way you have the ability to navigate if the gps...
James Gallagher is a whelen dealer, and is very knowledgeable about what goes where. He helped me out with my bonanza when I wasn't sure what to get. He usually has Sun and Fun discounts if you can wait a week.
https://www.gallagheraviationllc.com/Aircraft-Lighting_c_24.html
Skip the wife and kids for now. If you don't, be sure they know that you'll be gone for long-ish periods of time and you may have to move at some point.
Here is an article that compares United to the other two.
https://www.msn.com/en-us/travel/news/how-united-airlines-incidents-compare-to-other-carriers/ar-BB1klONi?ocid=msedgntp&pc=U531&cvid=095b294bd0c84309b019e6ca692af065&ei=13
I bet you didn't know that American ran a 737 off the end of a...
Not the first airliner to make this mistake, and probably won't be the last.
This one was pretty bad: https://en.wikipedia.org/wiki/MK_Airlines_Flight_1602
If it is an uncontrolled airport, the traffic should be saying what their type is. I.e. "Podunk traffic, Foreflight 1234 is a King Air 200 on a left base for 35, Podunk. If it is controlled, ATC will tell you the type.