Help Required in Migration from Vbulletin to Discourse

We are a forum working out of India and is probably the biggest forum in its space. We have approximately 200,000 registered users with huge amount of Posts and Replies. We are currently Vbulletin based forum with some modifications performed as per our requirements.

We have received a feedback that this type of Migration is not possible for a forum as large as ours. However, we believe that this migration is completely possible and can be done. We do not have resources to perform the migration in House and will like to outsource this task. Can anyone take up this task? We are ok even if we have to pay some amount to get it done.

Regards,
Nitesh

SitePoint recently migrated from a much larger vB forum, so it is theoretically possible.
Unless it’s your customizations that are causing the problem.