Established vs. New Outfitters
As someone said above, all outfitters were new at some point. And for anyone new to the business and wants to run a proper honest business, I wish them all the best in their endeavours.
The simple way of looking at this is an established outfitter with a good reputation is someone that if you plunk down a deposit, you can sleep well at night until your hunt starts that you've given your money to someone who isn't going to go out of business sometime before your hunt begins, taking your deposit with them. If they've been around and again established a good rep, then they know how to treat their clients and just as importantly how not to treat their clients.
Having said that, it's not a 100% guarantee. Occasionally you see an outfitter who has had nothing but glowing reports for years, does go out of business. Or an outfitter is struggling for whatever reason and this starts to show in how hunts are conducted.
But from what I've seen, established outfitters are that for a reason and the majority of hunters who hunt with these guys have good experiences.
With new outfitters, you just don't know what you're getting, there's no history to read on the specific outfit. In this case from the quick perusal I made, it seems Dzombo was started by some PH's who have some years of experience under their belts. So hopefully that experience has taught them the right way to do things which they'll hopefully follow and also the wrong way to do things which they'll hopefully avoid.
If you decide to continue looking at Dzombo for your hunt, I'd encourage you to do as much research on the gents that started this outfit. If they've got the experience they say they do, their names should pop up in hunt reports.
But in the end with a new outfitter, you're not likely to have the same level of confidence in as you would one that's experienced. There will be some higher level of perceived if not real risk, only you can decide how much that will weigh on your mind.