WordPress on bluehost

I have two add-on domains at BlueHost, and BlueHost has its own way of pointing an add-on domain name to any folder of any name that will be containing your installation. So as far as I know, you can go there and add a folder inside public_html and do a WordPress installation, then point your add-on domain name to that folder, upload your wp-content folder, import your database and update wp-config.php and be good-to-go without having to do anything more. To be sure of that, just give them a call.

I have never done exactly what you have in mind, and you might already be experienced with importing a database. So where I would do a new installation and get it working before adding my own stuff to wp-content and then importing to the new database, maybe you already know how to do those things manually. But overall, I just know I could move any of my sites to any different folder and then just do a simple re-assignment at cPanel without having to do anything tricky.

just that I have never done it on an addon domain.

Being ad add-on makes no difference at BlueHost, and no existing htaccess file will need to be modified. If you have mydomain.com working as it is right now, the BlueHost cPanel will point that name to your installation’s new location and everything will work just as it is. But if your are presently using mydomain.com/tmp/ and now want to drop the tmp/, that would require doing the tricky stuff.