Muse Operations has integrated Marketo with Salesforce many times and can help you avoid the pitfalls and give you the scoop on some of the nuances on the strange way you control your 'database size' (hint: you hide everything from Marketo and then share it selectively).
We can typically get this done in a week or two under our Medium-sized retainer model.
Sync your data to Salesforce and track your team as they move work forward. Set goals for timelines, response/cycle times, work in progress, and more. Any process, any object in Salesforce.
