so here is an update on my efforts.

I was previously using the static IP address of the host Pc in the drive map on my remote client.

it was \\192.168.1.30\quickbooks

It is now using the FQDN or \\PCNAME\Quickbooks

the results are

the login opening screen is 8 seconds

The opening of the program after entering the password is 25 seconds.

these were 50 seconds to get t the login screen,  and 3 minutes to get the file opened after entering the password.

I'm not sure I'm going to complain about these numbers...

So the Lesson is DNS / FQDN's operate faster than Drive Maps using IP addresses.

I suspect the IP address mapping forces a lot of resolution issues, but finally figures things out.