Scott - thanks for the tip on the Natura line. Your site is great and would like to know what spray equipment you would recommend to spray the Natura 100% latex? The Fuji HVLP 4 turbine states it can spray latex with 20 % dilution. I'm no pro and would like to have some flexibility in what else I can spray (i.e. clear urethane) and can only justify buying one machine at this point with my $1000 budget.
For your situation, I would recommend this.
The 20% reduction your Fuji calls for could hellish on verticals in waterborne finish. This is where 5 stage can be better, and the gun is a bit better geared for finishes like Natura.
We shoot oil based and waterborne satin impervo (and many other wb staples) with this gun and turbine all the time.
I have seen it in the $1200 range. So, take the bottles back and scrape it together, I think this machine would do what you are looking to do.