This is purely a commercial choice. There's no need to hasten your web design development creation if it's for new clientele. You should keep it to a week or a few days if your website is largely for existing clientele. You'll most likely be busy with answering queries from clients who visit your website on a regular basis, and they'll start contacting you through other channels at that point.
You can go online on a regular basis with a trimmed-down version of your site. You may go ahead and publish the most crucial pages if they are ready for visitors. You may work on your other pages in the background at your leisure.