Warmer temp's may not be ideal, but they are certainly not as big a roadblock to keeping neocaradina as you might think, as the following photo's hopefully prove:
Both tanks are 11 litres water volume, cooled (slightly!) by a small fan that hangs on the back of each tank. The fans are connected to a temp controller so they only run when the temp goes above 27C (80F). Here in Singapore, my room temp is 27C (80F) minimum during day with air-con running, up to 29-30C (86-86F) at night when air-con is turned off. Without fans, water temp's would sit at about 28-29C (82-84F). Fan controller is set to keep tanks at 27C (80F) max.
(Note: I work in Celsius - hopefully my C>F conversions are correct!)
The left tank is Sunkist orange neos and is currently full of newborn shrimplets, as per two lower photos. Right tank has yellow goldenback neo's and lots of 1-2 week old juveniles. It **is** possible to keep happy, healthy, breeding shrimp in higher than the standard-quoted temp ranges. It might however be more tricky, and the tank balance far more delicate, than in a cooler tank (but I've never kept shrimp in a cooler country, so not sure). Breeding might be better in lower temps, but my shrimp are now breeding at my "too high" temps. I've read that higher temps cause shrimp to grow faster, and I have a feeling that faster and more regular molting can be an issue (had a fair few shrimp showing water ring of death in failed molts when I was starting out with these tanks). But if you get everything else right, then slightly higher temps (say up to 27C / 80F) are possible.
Most shrimp suppliers here in SG keep shrimp at about 27C (80F) lightly air-conditioned room temps. I've not heard of anyone using a chiller for neo, but most will use one for caridina to get the temp down to around 25C. Chatting to one of the shrimp 'experts' here, he said that today's neo have come a long way from the neo's that had been bred at the time that all the shrimp keeping rules were written. Current lines are far hardier than they were even a few years back, and can survive / thrive in more extreme conditions (esp. higher temp's) than they could. This was his opinion, and it seems to ring true for shrimp keeping here in balmy Singapore.
I'd suggest finding a local breeder and seeing what temp he keeps his shrimp at in your climate. It will be harder work at higher temps, you'll need a fan to bring the temp down a bit (and then be prepared for frequent topping up of evaporate!). I'm currently trialing Sochting oxidators in my tanks because H2O2 seems to have many benefits for shrimp tanks (one being increasing oxygen levels, which might be reason enough to use one in warmer tanks!).
But it is possible!