Use systemd timer to delay boinc startup

Using Ubuntu 16.04 (or any system with systemd)

Current status:
boinc-client shows up as costing 1 second at boot with systemd-analyze blame due to sleep 1 in service file. I'm guessing this is to try and make boinc have less impact on bootup (it does afaict). If there is a different reason this might all be moot :).

Proposal I'm looking into:
Using systemd timers to tell boinc to start running X amount of time after bootup.

Something like:
/lib/systemd/system/boinc-client.timer
[Unit]
Description=Runs boinc-client service after bootup

[Timer]
OnBootSec=25s
Unit=boinc-client.service

[Install]
WantedBy=multi-user.target

/lib/systemd/system/boinc-client.service
[Unit]
Description=Berkeley Open Infrastructure Network Computing Client
After=network.target

[Service]
Nice=10
User=boinc
PermissionsStartOnly=yes
#ExecStartPre=/usr/bin/touch /var/log/boinc.log /var/log/boincerr.log
#ExecStartPre=/bin/chown boinc:boinc /var/log/boinc.log /var/log/boincerr.log
ExecStart=/usr/bin/boinc --dir /var/lib/boinc-client
ExecReload=/usr/bin/boinccmd --read_cc_config
ExecStopPost=/bin/rm -f /var/lib/boinc-client/lockfile
IOSchedulingClass=idle

With the following boinc-client is no longer in the blame list at all!
I disabled the ExecStartPre because boinc-client seemed to start them earlier.
I choose 25s at random for my slow test machine. I'm not sure the best value there.

[1] man systemd.timer
OnActiveSec=, OnBootSec=, OnStartupSec=, OnUnitActiveSec=, OnUnitInactiveSec=
           Defines monotonic timers relative to different starting points: OnActiveSec= defines a timer relative to the moment the timer itself is activated. OnBootSec= defines
           a timer relative to when the machine was booted up. OnStartupSec= defines a timer relative to when systemd was first started. OnUnitActiveSec= defines a timer
           relative to when the unit the timer is activating was last activated. OnUnitInactiveSec= defines a timer relative to when the unit the timer is activating was last
           deactivated.
[2] http://jason.the-graham.com/2013/03/06/how-to-use-systemd-timers/