This depends on how ready YOU are.
With a NBFI (Non-Banking Financial Institution) the due diligence parts takes between 2-3 weeks, and contract negotiation and flow of funds, etc. can be done in parallel. It takes between 3-4 weeks to get an agreement signed.
With a banking financial institution, the numbers/timetable above are easily doubled.
To go live, depends on your technical prowess and readiness. Usually clients go-live in about 3-4 weeks after that with NBFIs and between 6-8 weeks with an FI.