When hunting at night, Positive Identification (PID) of your quarry is paramount. Nobody wants to be that guy that mistakenly shoots a calf or neighbor dog/cat. The better units you buy allow for PID at greater distances. With that said, buy the best you can afford. You have a decent budget to start with, and could burn through that quickly!
I would recommend NV (pvs14 or dual tube setup) for navigation, and dedicated thermal for hunting. This is a very commonly used combination. There’s an extensive thread on here about buying pvs14s. Prices ranging from $2500-4k.
Dedicated thermal units with 12-17 micron BAE cores are the best on the market currently. Trijicon Reap-IR, IR Hunter Mk2 or Mk3 and N-Vision Halo or Halo LR units are the way to go. Prices ranging from $6-10k. I would also recommend a higher native magnification unit as you’ll be shooting smaller targets (predators) further away.
You also mentioned clip-ons...good ones are pricey and heavy (NV and thermal).
First the thermal: L3 LWTS LR or Trijicon UTCx/UTCxii units are the best on the market and they range in price from $10-18k.
NV clip-ons are a little more affordable: pvs22, pvs24/CNVD LR, pvs27 MUNS, KAC PVS30, or KAC UNS LR A2 range in price from $3500-15k depending on tube quality/condition, WP/GP, and new/refurb.
Getting back to my recommendation for dedicated vs clip-on for hunting...it boils down to one thing, WEIGHT! Dedicated thermal units weigh roughly the same as a long range scope, 1.5-2 pound average. Clip-ons add 2-3 pounds to the front of your weapon (in front of the day optic) making the weapon rather unwieldy (15-20 pound weapon) unless it’s mounted on a tripod. (Since I mentioned tripods, buy RRS w/ anvil 30 head and don’t look back, $1200-1500)
Dual NV tubes (i.e. dual 14s, pvs15, Anvis9s, Mod3’s: $4500-15k) are better than a single pvs14 for driving if you’ll be doing that. Then there are dual band setups with a pvs14 bridged with a 1x thermal monocular (i.e. flir breach). There is an entire thread on here discussing the use of this setup.
You also mentioned taking friends/family/clients out hunting. Buying multiples of these units also gets pricey, but night shooting/hunting is more fun with a buddy!
This is just some of the info I gleaned from the research I did when I was a NV/thermal newb; I’m still very much a student of the game. There is MUCH more info out there and MANY people more knowledgeable than myself on here that would be glad to help you! I’m sure
@wigwamitus is around here somewhere and will weigh in soon. He has a VAST working knowledge of this equipment and hands-on experience with most (if not all) of it!