Welcome to the club

I'll start with T/C since you mention them and I have a 2 mzl'er and handgun.
T/C , been around for years. makes a reliable,affordable ( not way overly price and not cheap ), you can find parts for them in BasPro, SportAUthorirty and some walmarts.
Knight, been around for years probably one of the first inline mzl'er company iirc and some claims Mr knight was the pioneer that brought inlines into the front grounds for mzl'ers. They used to be very popular in the day but don't seem to be so now adays with some many other models out. A few models that shoots 209 primers will need the 209primer holder which could be a ***** to get.
CVA, conn valley arms. They make greater starter kits, cheap but not made cheap. I had one when I first started out in IL with mz'ler killed 1/2 dozen deer with it. Worked great never failed apart fired first shoot all of the time. Paid under $150.00 and that include cleaning supplies, #11 caps, 1 dozen or so of bullets.
Other mfgs that might be of interest, Traditions. Yes this small company produces a few great mz'ler that are affordable. Also winchester makes mzl'er and mossberg make a mzl'er bbl for their shotgun.
1st question you need to ask yourself. What do you want to hunt 45 or 50 or 54 or ????? caliber ?
45/50 are more easier to obtain supplies than 54 or 72 caliber. 50cal is then more easier to obtain than 45cal bullets/sabot/etc...... In just about every store and you do have a wider supply options for 50cal projectiles.
2nd, do you want to immediately jump to a 209 shotgun primer or try #11 percussion caps? The #11 are way cheap and depending on location easier to obtain. 209 are straight forward reliable but could a ***** to extract on some models. Both could be equally hard to load in cold weather and or with gloves on, but the #11 is very easy to start with. Stay away from musket caps due to the "fact" they are harder to find and more expensive to fire but they are just as reliable as 209primers.
3rd, you might want to find a platform that allows for either #11 or 209 ignition systems, which would allow you to experiment between the 2 ( see #2 from above )
4th, If your just getting into the field, I would suggest something cheap or even used, to get you started. You might find some good deals if you bargin at the pawnshop or review the newspaper and craiglist and forums.
5th, go out and have fun. I don't know about upper florida, but down here you can hunt mzl'er during the mzl'er season and general gun and during any parts of the WMA that don't allow centerfire rifles. My favorite WMA in Palm Beach county just restricted the back southern end from centerfire rifles due to residential areas nearby. Another hunting ground is all NON centerfire rifles so that leaves you with bow/shotgun/mzl'er/etc...
Your chances of getting a trophy buck is greater in mzl'er season next to archery.