Here in the US, land was generally given in "grants" by the Kings and Queens of England. Either the landgrants were given as a reward for service or to pay off debts.
Charles II owed money to William Penn's father and when William Penn needed the cash and called in the loan he was granted the area known today as Pennsylvania.
http://xroads.virginia.edu/~CAP/PENN/pnintro.htmlI recently toured the Tryon Palace in North Carolina ( a duplicate of the original that burned in the 1790's) and discovered that one of the first governors of that colony was well-connected through his marriage and was granted a governorship. Now whether that was a payback, a gift...no one knows.
There are also many cases where land was acquired by just plain old homesteading.
That said...the workforce to farm the land could either be obtained expensively or cheaply..and the early capitalists discovered that they could hire free men or acquire indentured servants or slaves.
Now having recently toured Mount Vernon, I read that Washington was not fond of slavery and found that it was better to design more efficient methods of farming which he ended up doing...he freed his slaves as part of his will (funny that Jefferson is touted as such a man of many talents...but yet the same is true for Washington and he is more known for his presidency and his military campaigns...)
As for buying titles...that would be better done in Europe than here in the colonies, because you would have to have been at the court in order to gain the political edge needed to wheedle a title out of the King...