Translation:The rich woman would purchase a big boat.
'Boot' is a borrowing from English, especially because German rarely uses double vowel diphthongs. The sound in English /oa/ is from Anglo-Saxon /â/, a long A. English had what is called 'the Great Vowel Shift' when vowel sounds changed massively, thus long I, which previously sounded like /ee/ now sounds like /ai/ (eg. 'bite' was like 'beet'), also long A, which previously sounded like /ah/ now sounds like /oa/. Therefore Old English bât > boat, ân > one, stân stone, râd > road, bân > bone, hâl > whole (w added to prevent confusion with hole, also became 'hale' without shift in some dialects). These correspond to /ei/ in German (both sounds from a Proto-Germanic /ai/), so ein, Stein, Reit, Bein, heil etc. A boat in Anglo-Saxon and Friesland referred to a specific kind of boat which the tribes on Germany did not use (one would expect '*Beiß', thus they used different words, but later borrowed the English word as 'Boot' to match its /oa/ sound.
Acquire, obtain vs. purchase. The former needn't include buying, but simply refer to the passing of ownership.