Terrain issues ( A LOT OF THEM) Hoping someone can help me out here

I don’t really get responses here but hopefully I will this time.

This is driving me crazy at this point I have followed every tutorial, read about 30 different threads and still I am having issues with terrain in UE4.

First off my computer specs

windows 10
Processor Intel(R) Core™ I7-7700k CPU @ 4.20 GHz
Ram 16.0 GB

First Problem:

I am importing a landscape through World Composition, its 8km by 8km, 64 tiles imported at 1009 x 1009. Componets 8x8 sections 2x2 quads 63x63. Its Using over 8gbs of ram to process just a blank landscape, I feel like I am doing something wrong here.

Second problem: (exists because of the first problem)

Using weight textures to texture the whole landscape crashes the computer because it doesn’t have enough memory.

Third problem: LOD system

I haven’t found a good explanation on how to use this yet, Id assume that the LOD system would free up some memory. I know how to enable it, it frees up a very small amount of memory but I still feel like more can be done to free up memory.

Fourth question/problem
Can I weight texture individual parts of the landscape instead of the whole landscape at one time? If so how would I do that.

These problems have been going on for a month now and this is usually my last resort if anyone can help that would be awesome because this is extremely discouraging I am about to go back to unity and take my chances there.

your tiles need to be 505 or 1017 in size or they wont import right. you can always scale them on import. and a terrain that size should not be eating up that much to import. What did you use to make your terrain?