I’d recommend the following: (no affiliation)
https://interconnectit.com/products/search-and-replace-for-wordpress-databases/
For some reason I’ve had odd experiences with the search and replace db plugin recently.
Also, I’d avoid using the defines in your wp-config.php file as some plugins do not use it and show strange behavior. Better to update the wp-options table for those two options if at all possible (at least, that has been my experience).
I do a lot of what you are doing … and have never had an issue using the above tool. Just make sure to pull it back off the site once you are done.