So after doing a little research, it would seem that the "Presidential Travel Costs" are higher. But unfortunately, it's not an apples to apples comparison. Mostly it seems that the graph is comparing "estimates" to reported costs. Some (or most) of these estimated costs may be way higher then they actually are. It also seems that the number listed includes money spent before Trump became president. Looking at the Mar-a-largo trips only (which the graph seems to do), the estimated costs actually come from Obama's trips to the area. When looking at the larger idea of "more expensive" the actual "expense" is not yet known and the estimates are based on numbers like $1,000,000 a day from New York, which turned out to be more like $308,000 a day. Still a big number, but a far cry from $1,000,000.
While it's hard to find exact numbers Sites like https://thinkprogress.org/trump-first-month-travel-expenses-11-million-a1feb6cd829b seem to indicate that the costs also include expenses for his wife, sons, etc. etc.
It's also important to note that the costs are estimates and not real numbers. Some of those estimates are based on Obama's travels and not Trump's.
Some intresting excerpts from https://www.washingtonpost.com/news/politics/wp/2017/03/17/how-much-is-donald-trumps-travel-and-protection-costing-anyway/?utm_term=.5f6602bb3066
We can start with the Trump Tower number. The million-dollars-a-day figure was sourced to three city officials, reflecting the city’s costs.
In February, the city of New York detailed precisely how much it had been spending to provide additional security at Trump’s home. Between the election and the inauguration, when Trump was living there as president-elect, the city spent about $308,000 a day. Once Trump moved to Washington, the city expects that the cost will be up to $145,000 a day when Trump isn’t visiting. (He hasn’t since being inaugurated.) That’s sharply lower than $1 million a day.
As pointed out, that no where near the estimated $1 million a day.
There were also reports about the Secret Service and the military seeking to rent space in Trump Tower to aid in supporting the president. It’s not clear whether that’s happened or how much space has been rented. (The Secret Service denied that it was planning to rent space.)
CNN estimated that one of the floors of space reportedly under consideration could cost $1.5 million a year — or about $4,100 a day. If those numbers are all correct, and if the military rents that floor, the total for protecting Trump’s family in New York is a bit under $200,000 a day, including New York City’s costs.
Again this is if they rent space, and it they rent that much space. We don't know yet (I think) that they are, or what kind of price they will get if they do, but Trump hasn't been back to Trump tower sense he became president.
Politico’s $3 million-plus estimate was based on an October 2016 Government Accountability Office report on a trip President Barack Obama took in 2013 — a report that The Post has also cited. That 2013 trip, which included a stop in Palm Beach, Fla., cost $3.6 million, $3.2 million of which was the cost of aircraft.
Airforce one, and it's support, is expensive there is no way around that. But the estimates used for "Trump's Costs" came from Obama's trip. Which is fair, IMO, but should be noted.
In part, it’s the cost of support aircraft. That 2013 trip included five other planes and four helicopters as part of Obama’s overall team, serving defense and short-distance transport roles. (The president goes to and from Andrews Air Force Base by helicopter, for example.) But that trip also included an unrelated trip to Illinois, meaning a much more complicated ballet of movement than Trump’s Mar-a-Lago trips would require.
Basically, did Trump take the same number of helicopters and side trips? If not then his costs may be more or less, it depends.
A five-hour trip to Palm Beach, then, would be about $2 million — $514,000 times four hours. This is a very loose estimate, mind you, but it seems more fair than $3.6 million.
So, again, and the main article is important to read, the number seems to
"adjust" down from the estimate considerably, and even the source of the number states that is a "very loose estimate".