I can’t imagine that msi = 20MB.
Without java it is about 50MB …
MSI does not make sense, if you use Active Directory then it is easier for you to write a script. And if you have SCCM then you can install exe.
this script install for Windows x64
IF EXIST "C:\Program Files (x86)\Spark\spark_2_9_2.txt" GOTO END
taskkill /F /IM Spark.exe
"C:\Program Files (x86)\Spark\uninstall.exe" -q
rmdir "C:\Program Files (x86)\Spark" /s /q
mkdir c:\drv
xcopy "\\srv-it\app\Spark2.9.2\spark_2_9_2.exe" "C:\drv" /Y
start /wait c:\drv\spark_2_9_2.exe -q
xcopy "\\srv-it\app\Spark2.9.2\spark.jar" "C:\Program Files (x86)\Spark\lib\spark.jar" /Y
xcopy "\\srv-it\app\Spark2.9.2\Spark.lnk" "C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Startup" /Y
copy /Y nul "C:\Program Files (x86)\Spark\spark_2_9_2.txt"
:END