Points to consider
If budgetary estimates are not affordable (on the basis of indicative information received) be prepared to revisit the scope of the project and look again at the priorities.
Can you identify what type of contract management/relationship focus you will need to adopt to give the contract the best chance of success? Can you identify the arrangement that will best realise your business model and deliver the objectives sought? Are you realistic about your organisation's ability to manage the contract and the expected pace of the planned programme of change? Can you confirm the procurement strategy?