@EWD-LLC 

They said the fee for this service is usually around $5,500 + tax. Unless they lower the cost, it's too much.

We have better options to recommend:

1. Purchase a 3rd party service to convert data with attachment starting from $1,500, OR

2. Use the trial version of QB Desktop to access your historical data with attachments for good. You don't need to migrate the attachments data to QB Online.