No. The timeline still depends on documenting the funds, the enterprise, and the purchase terms in writing, and an informal understanding needs to be converted into the actual agreements and records the filing requires.
Formalize the arrangement before relying on a timeline
Identify what still needs to be documented in writing and build the timeline around completing that work, rather than assuming a longstanding relationship between buyer and seller shortens the evidentiary process.
Because the application is judged on funds already committed, the lease, equipment purchases, insurance and client agreements should be executed and paid before the interview date. Official guidance recognizes a purchase conditioned on E-2 visa issuance as a solid commitment when the purchase funds are held in escrow for release or transfer once that condition is met. Work backwards from the lease commencement and mark the last point at which each obligation could still be deferred or renegotiated, since a fixed rent liability running against an enterprise that cannot yet lawfully be operated is the specific risk this sequence exists to avoid. If the seller cannot wait, consider a management agreement under which the seller's team operates the business through the season on the buyer's behalf, with ownership and control passing at closing.