Even billionaires (slash presumptive Republican presidential nominees) have to start somewhere. For Donald Trump, that translates to a "starter" estate nestled on its own peninsula on the Atlantic coast.

The property at 21 Vista Drive in Greenwich, Connecticut was the real estate mogul's very first — no, not house — but mansion, and it's now on the market for $45 million.

Trump purchased the Georgian Colonial estate for $4 million in 1982 (when he was first rising in the real estate ranks) with then-wife Ivana, reports 6sqft. At the time, Ivana was refurbishing the Plaza Hotel, and lent the same ornate taste to the circa-1934 mansion with massive chandeliers, moldings, and in true Trump style, generous amounts of gold.

Ivana received the oceanfront mansion when the couple divorced in 1991, and sold it for $15 million seven years later. The new owners added even more grandeur (yes, apparently it's possible to outdo Trump in the luxury department), with an indoor lap pool, tennis courts, and a sauna.

The 19,770-square-foot home sits on six acres and includes eight bedrooms, 10 full bathrooms, and three fully-equipped staff apartments, according to Trulia. Surrounded by the waters of Long Island Sound, the estate's main rooms overlook the pool, putting green, tennis court, and manicured lawns.

Oh, and in case you'd like to watch the presidential debates on a big screen, the home has its very own home theater. It's also a prime place to host parties — if you'd like to take your cues from the Trumps.

"The Trumps entertained here a lot," listing agent and luxury broker Tamar Lurie of Coldwell Banker in Greenwich told USA Today. "The current owners are very low key. They certainly entertain, but they're much more family oriented. They brought it down a notch."

Check out photos of the mansion below.

(h/t: 6sqft)

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