I have owned a normally aspirated 210L a Turbo T210M a 206H and a 182S
The 210 NA was slightly faster than the T210 by about five knots,
The biggest maintenance issue was the turbo charger, you have to change oil frequently and let that sucker wind down before shutting it down, no big deal, I did all that but it still had its days.
Both are great IFR platforms and will haul nice loads with great range. just don't stretch it distance wise.
Landing gear, I never had an issue in 3,000 hours of 210 time,and I had the gear doors, trick was I did not drop the gear above 100 kts, that came from Cessna service center old timer, if you drop them fast they can have cracks or bend, big bucks the ones that had the doors taken off are slightly slower , the landing gear system on a 210 is complex for sure and can easily get out of wack.
Nose gear, the wires that tell if gear is up or down are prone to bending and cracking the wires so no gear indication, if you buy a 210 get the wing mirrors and always loo down after dropping the gear even if the green light is lit. Ask me how I know that, nose came down on a brand new 210, but the mains were not down, since the down light is connected to the nose gear I had a green light, all was good ? NOT
If your mission is to just go from ATL to FL you do not need a turbo, when I was a young guy flying a lot of Cessna's from the factory to the new owners/ dealers more T210's went West, than East more T210's were made than NA
Turbo does burn more fuel not a lot but 18 gallons without leaning the daylights, I like to run lean conservatively burn the fuel than buy cylinders, it worked for me the NA was about 16.5
Speeds, I never really sat there and said what is my TAS, I am more about GS and how long is it going to take, the 210NA averaged about 160 kts, the turbo about 165 on good days, and I made a lot of trips in 210's
The back seats are worthless except for kids and a PIA to get to, the baggage doors likes to leak.
Find a C 210 guide by John Frank former CPA guy.
I also had a 206H, that sucker had a lot of 210 qualities except speed, it is really a 135 knot airplane, the 182S was about the same speed, I took out the rear seat that gave more room for cargo, watch the W&B it as not hard to get the tail low if loaded heavy in the rear . landing if you have two people and full fuel you are forward CG and it was harder to flare, so I put some weight in the back when I flew it solo or tow up front so it was easier, I think the 206 was heavier on the controls the horizontal tail was larger than the 210
206 was a great short field airplane, lightly loaded I could get off in about 500 feet with 20 degrees of flaps. and the stall horn blowing stay
Landing I could land in about 800 feet stopped on an 1800 usable foot grass runway with 100 ft trees at the end
The 206 fuel burn about the same as the 210's just slower, the restart 206's have some nice stuff on them that the previous Cessna''s did not but they weight if the add ins did decrease the useful loads.
If I were you and your mission is the beach at Pensacola, I probably would not buy a 210, the maintenance is higher, the insurance is higher, they are all older air frames, you have to deal with smoking wing rivets, doors do not shut right, gear issues and the avionics might need upgrading. Just a few things to think about.
The 210 is an awesome airplane, fast and good loads it is actually my favorite single engine airplane and I have crossed the USA many times in a 210, in all a lot of IFR, it is a beautiful airplane for longer trips, stable and easy to land.
The 182 is more than adequate for what you want, you are not going that far, the time saved in the 210 vs the 206 or 182 is maybe what 15-20 minutes, My 182S actually fit my flying, the best cost wise and utility wise.
206's are pricey and in demand I would look for an 1998-2002 to save some $ make sure that the crank AD was done.
210's look for the last year made 1985? they are the best ones made
But look at the bright side you will see all of GA and AL from down low and slow, rather than fast and high, and you can cruise the beaches down low too.