let us start with obvious- are you made of money?
If you are, then this is a no brainer, go for it.

If not, I would look at
A) is there a critical need, and
B) bang for buck

A) is the a medical or business need for instant backup?
if not, go to B)

B) what is this worth?

This will likely cost upwards of $10,000.00 installed.

How many hours/days of downtime do you have a year? lets say 2 weeks a year. and assume generator lasts 20 years. 40 weeks of power for $10,000.00- ignoring service and gas, that is $250.00 per week of use, kinda steep.

a 6500 watt Honda Industrial generator is 2400.00 , 1/4th the cost, and you could take it with you if you move.

honestly, I looked at this too, but could not justify cost/usefulness.

unless you are really rich, or cannot afford 5 minutes downtime (medical equipment/business needs) I would say no.