Assembling an estate-based source-of-funds package commonly takes months rather than weeks, because it depends on records held by an executor and by institutions. Project due diligence and legal review follow, and the adjudication and visa stages come after that.
The estate paperwork sets the pace, and it cannot be accelerated by money
Adaeze controls her own records and controls almost nothing else on this timeline. Requesting the executor's accounting, obtaining probate copies, retrieving an institution's historical statements and locating documents about how her aunt acquired an asset all move at the pace of the holder. Beginning those requests before choosing a project is sensible, because the answers may affect which structure is realistic.
Once the package exists, project due diligence and legal preparation take further weeks. After filing, adjudication times and visa availability govern, and neither is within anyone's control. The conditional period then runs two years from obtaining conditional residence, with Form I-829 generally filed in the ninety days before its second anniversary; that date should be diarized on the day residence is granted rather than remembered later.