Is there any unity 3d feature that is none pro that is somewhat like occlusion culling? How hard would it be too make an occlusion culling script, or are there assets out there that do the same job because occlusion culling is one of the most useful things for me that come with unity pro and I don’t see the point in buying it for that one feature. If you guys have any way around this in Unity 3d standard then help a fellow out here. Thank you guys!
Not hard at all for simple culling. And there are several assets in the store.
M2H Culling is your friend, and it’s free.
Thank you!
If you need a fully dynamic occlusion culling solution - no baking time, perfectly compatible with procedural and/or dynamic content - for all versions of Unity, you could give InstantOC a go 
And it comes with integrated LOD and dynamic lights occlusion culling too!
PS: it’s currently in promo (15$), in 6 days it will cost 25$.