As to who with, or how much it should cost, I have no idea.
From my screen name you may guess that I'm kind of a Javelina junkie. Perfect bow quarry for any bowhunter, but most especially for us fat, OLD, farts. Very poor eye sight, only moderate hearing (the whole herd is constantly making noise), but a very good sense of smell. Really easy to get up on as long as the wind is in your favor. Even named my company after them. We 2 old fat farts who have poor eyesight, and probably don't smell go good either just felt it was appropriate.
Most hunters don't specifically seek them out, but a few of us do. Lots of "deer" hunters shoot them and let them lay, figuring they are varmints. Those folks don't know what they're missing off the pit, or made into tamales.
They have a gland on their back a few inches forward of the tail that for all the world looks like a small nipple. The smell is reminiscent of a skunk. Seems that they use it for group communications. Staying in contact, if you will. Once the critter is skinned the gland comes of with it, and that's the end of the smell factor. The flesh is a nice light pink like pork, but with very little fat. Absolutely excellent table fare. Also goes well in sausage mixed with venison.
In some areas they will be covered with fleas and ticks -- in other areas, not one to be seen.
They can easily be hunted from blinds, setting up in the brush over a sendero dribbled with corn, or spot and stalk. For sure, if you've got some corn out a herd will hit it twice a day, and sometimes more than one herd in a day. A given herd will usually come out 45 to 50 minutes later each day. I'm convinced this is tied to the Moon cycle.
Just be aware that their preferred food is prickly pear cactus. Not so good for snooping and pooping. The pear diet means that they almost never go to water.
If you get on a group, and especially if they have young, and they know something is up, they respond by popping their tusk. They can't see you, but know something is not right. It's a threat/defense thing, I believe.
At the shot, especially if one is hit and squealing, the bunch will scatter in every direction, still popping their tusk. According to some this is a sign of their aggression. I think it just shows utter confusion.
Only once have I gently laid my bow on the ground and sought shelter in a Mesquite tree. In your typical Mesquite you'll be doing good to get your feet more than 2 feet above the ground. That's OK, they simply can not look up.
At that point you'll probably still hear them in the brush. This is the time to take out your close range predator call (dyeing rabbit) . Use it very softly and you'll have them coming at you from every direction. Time to get number 2.
In Texas the limit is two per year on the honor system. No tags required.
Just my opinion, but if you can find someone to get you on a hunt, you'll have a ball. Often included are varmints and hogs.
Given their habitat, you want to do this in February or March. Any earlier and it's still deer season -- any later and it's too durned hot.
Give it a try, and best of luck with it. It's a action filled blast. Only in Africa can you have more fun.