Not hard at all
Id guess I sold about 1000 Jacksons in the last 2 years and they were no trouble at all. Since they were imports I kept them at least 6 weeks while I treated them for possible parasites before selling them and still have 1 male that I kept as a pet.
The main thing is if they are wild caught imports to make sure they are parasite free, the seller should treat them for parasites but the buyer should also take them for a prelim vet exam $25 to make sure they are parasite free. YOu may even be able to just get the fecal done for less than $10, some vets will others will not.
This does not mean that captives do not get parasites, its just less likely that a captive will than a wild caught which normalyl does haev parasites, so in my opinion you should take them either way or treat them with a natural parastie removal like para-zap or worm guard as directed on package insert to be safe.
Then make sure they are in an all screen cage, teh larger the better, I haev my 1 male is a 260 gallon reptarium but a 65 gallon would be fine, with lots of branches to climb around on, you can either use live or fake plants, I prefer live plants, others prefer fake.
With live plants you can take the plant out every 2-3 days, put it in the bathtub and spray off any feces, with fake plants I have found them harder to take out since you usually need to attach them to the branches.
Make sure to have proper humidity, they needs quite a bit of humidty, 80% is a good level and proper basking of about 100 with a range of 80-100 day and 70 or so at night
Do not use vitamins but 3-4 times a month, with jacksons, too many vitaimins are worse than not enough.
Use UVB, mercury vapor or active UVB, these will provide the heat and UVB all in one bulb and replace it every 6 months. Or you can use a florscent and a ceramic heater, I prefer the mercury vapor
As long as you keep the UVB, humidty, and tons of crix they are truly wonderful animals, Im guessing my adult male male eats abotu 1 dozen crickets a day
But do not think its a reptile to be played with or handled, although some will tolerate being handled, they do not like it and some will stress form it.
They are a wonderful cham to look at esp when its eating time, they are a joy to watch!