Small excel job - could lead to large BigQuery job

Please tell me how long you think the job will take you and when you'll be able to start.
If you would rather get paid in a flat fee, please propose a price.

Here is the small job:
Description: Reduce a database to only certain records, then deliver it to me in Google sheets format.

Database: ----------

Reduce to only records with these account numbers: ----------

Work in the future:
I have been helping homeowners with their property taxes for free for the past few years using sheets and google apps scripts. The number of people I'm helping has grown exponentially, so I need to upgrade my technology to handle more volume and conduct more complex queries. I think Bigquery is going to be at the core of it. Please describe your experience with Bigquery to be considered for this future job.