ONE Z body, Two AF lenses How to better deal with? >2x FtZ >+1 F Body >any other choices?

I want to make it easier for me to change the lenses if something interesting happens.

I have the AF-P 70-300 5.6E with the FTZ always plugged on.
It's laying horizontally inside the small bag, my Z30 with the Z 18-140 over it.
The Sigma 150-600C is in a separate JJC TubeBag

From the closed bag having the camera ready to shoot takes usually less than 6 secs, if the zip comply

When I want to switch to the 300:

• 1) I pull it from the bottom of the bag, unplug the 140, switch the back cover, and plug the 300 lens.
  Out the front cap and ready to shoot, it takes around 16-20 seconds or less.

When I want to switch to the 600:

• 2) I switch passing by the 300
  I do 1) then unplug the 300 from TFZ, and put it back in the bags.
  Unzip the Big Bag, switch the back cover, and plug the 600 lens.
  Ready to shoot, it takes 46-105 seconds, depending on the bag Zips

• 3) I switch the FTZ
  The 300 from the bottom goes vertically, !!unplug the FTZ, and unplug the 140!!,
  switch the back cover, and plug the FTZ.
  Unzip the Big Bag, the back cover go to the 300, and plug the 600 lens.
  Ready to shoot, it takes 36-85 seconds, depending on the bag's Zips, and two lenses juggling.

All these processes are quite error-prone and not easy to do it fast.
Not so different if I'm seated preparing slowly to put it on the tripod.
Even being careful and with too much hand handling, dropping a lens becomes a real possibility

I can buy:
an AF body and leave it on the 600 > 7500 = 8/900€ used OR a FTZ2 new 230€ / FTZ1 used 190€ ( missed a 90€ FTZ1 ) OR a Viltroz N-TZ 110€

I was on the idea to get a second body in the range of 250-300€
What stopped me is the cost of my choice D7500, and an unexpected Surgeon expense, concurring to drain my monthly check.

Being retired and only an amateur, I'm thinking to go for the less expensive option Viltrox, 110€

( unless you pose some good argument against it, or in favor of another option I missed )

.

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3) I did it at home and once the 18-140 tumbled out of the bag luckily dropping on the couch.
>>>>> Lesson learned !!

Hi Alain - just by looking at the lens setup, I'm seeing quite an overlap: the 18~140 and the 150~600 kind of make the 70~300 redundant, if you decide on taking the large Sigma with you. Same if you want to reduce size and weight, you'd probably leave the Sigma or both the Sigma and 70~300 behind, and just take the 18~140 with you. With carrying only 2 lenses, switching lenses is much easier and reduces the risk for an accident.

If you still want to take all 3 lenses, you might be able to solve the lens switching issue by getting a second body. For the focal length of 600mm/DX900mm, you'd benefit from a viewfinder, and a thought would be a used Z50 to stay on budget. Especially for wildilfe, having a viewfinder with the 150~600 is a great benefit.

EDIT: I underestimated the cost of a used Z50 - might unfortunately not be that good of an idea if you are on a budget

Thanks @hlmuc,
I looked at the D7500 because it has a bigger monitor, 'cause I really cannot make use of an EVF.
Maybe it would be better a Z5 for the IBIS...
...but budget constraints 🤷‍♀️ let me "DREAM" to buy a ff Z8 or a dx Z4.

Not really. The blue bag gives me a range from 14 to 450 in two kg. And the Sigma bag is another separated 2kg.
And the overlap is not significant:
or you have the 140 or the 300 on the camera, and you cover down quite well without having to switch lenses on an impromptu close subject if the occasion arises.

If I go ashooting with the 600 that makes the 225>900 range available,
and I can switch fast with the Z 140 (24-210) or the Z 14-50 >Macro-Mode< in under 10 seconds.

The issues are the middle range when everything is in the bag but the 18-140.

( and it depends too much on what lens the FTZ is seated )

I bought the Viltrox NF-Z in France - new for 86€

( hopefully it will not be a scam )