11 figures in 2 months sounds rich  Im just a student anyway.
I went from Gunpla to PVC statues as well (partly thx to all the professionally taken photos of figures you see in blogs, and the fact i began watching almost every single ongoing anime, even now). But my first step was hunting down all the figures i missed. Bad time to start collecting figures back then, budget low and people showing off their BRS, Saber Lily Distant Avalon which just came out around a month or two. I eventually hunted down all of them one by one before they get more expensive. Since then scale figures are almost the only thing i only go for now, nendoroids and gunpla are very minimal is any

My x-rated figures aren't much (many characters i either dont know much or not interested), but my parents had seen them before. Their only question "You like big boobs ah?". 

Some rare figures which people from other countries are complaining hard to find (such as in myfigurecollection.net), and expensive in Japanese sites, you can actually find them lying around in old stocks section of some local figure shops without an overpriced price tag.'

Wah, Alter's Gwendolyn, Mercedes and Velvet kinda hard to find. Yahoo Auction Japan might have it, but you'll need an agent/proxy to get it. Still going to end up paying a lot.

LED, spotlights, should be fine. But if you do have display shelves with spotlights it's not recommended to turn them on all the time. Just let the figures get exposed to natural light (but not directly by sunlight), and your normal house's lights are fine as long it is not of fluorescent variant.

Nowadays many of my figures stay in box, and i flip them around with the window facing the wall, while a few others stay in 3 of my wood cabinets. Only a few figures i display in my room.

1 simple clue for everyone, Good Smile's figures price usually maintain a stable price or enter bargain bin except online exclusives, especially since they screwed up BRS animation over a year ago. Saber Cuirassier also showed no signs of price hike yet, and IMO the only saber which the price will go up again is once again the Distant Avalon (which i think is more valuable than Golden Caliburn). Saber Triumphant Excalibur's price is still stable also, at RM 400 range. I dont really listen to rumors, i monitor the figure market and various other forums myself to predict what will happen.

So far i only know the companies with potential price surge after release is Alter/Hobby Japan, Orchid Seed/Amakuni and Native. Alpha Max's mainstream figures, PLUM, Fap Company, FREEing, price also drop kaw kaw. Im still waiting to see how the new companies Lechery (Kaitendoh renamed) and Arcadia (Yamato renamed) will end up.