I've been attempting to winterize the sim all by myself. I'm mostly used to doing small sections, this I can handle. So, that's how I've been approaching this. Small sections so that I don't get overwhelmed because I started out focusing on the whole chunk of land and I'm pretty sure I lost my mind a bit last week. But I'm allllll better now! And I'm working my way from the back to the front. It was a bit of a hassle working around the surrounding sims that aren't winterized, just because at any given angle you've got random green grass in a photo shot, which is just a no lol. So, I've been editing snow clumps, shifting around furniture…adding and deleting things. I'm lovin the gazebo from Pixel Mode @ FaMESHed, I think the lights make it sort of romantic with a dark windlight. The LI is I believe 34 though? So watch out for that if you're sparce with prims. I'll check that out and edit if needed, btw. I don't want to give out false info. I think I might put some dances in there and drag me a caveman to my den to get busy with 
Trompe Loeil – Frostbite Cottage White V2 (snow version)
{what next} Amalfi String Lights – Winter Blue
MudHoney Metal Tree Topiary *20L for Four Walls Hunt Gift!*
Sari-Sari – Snow Friends *New Release*
Studio Skye Enchanted Woods v2 – 7b
[PM] Pixel Mode – Winter Dreams Gazebo *Available @ FaMESHed – Dec*
ISPACHI [Graham The Teddy Bear] Christmas Gift *Ltd Edition Winter Gift @ Mainstore*