Asking if you should buy a game now or wait for a sale isn't allowed, asking when a game will go on sale is not allowed, asking how big of a discount a game might get is not allowed. Use SteamDB to look at sale histories on games. Source: 7 months ago

Here's how to cure you from your buying habit, checkout https://steamdb.info/, check the price history of the game you're thinking of getting. Most likely it's on sale once every odd month, and discount percentages are only ever increasing over time. So really you can just buy it when you think you have time to play it soon. Source: 7 months ago

Correct, it's trending on https://steamdb.info/ if you look at the panel, some games will show zero players. But OP is wrong, other games are trending too. Source: 7 months ago

Asking if you should buy a game now or wait for a sale isn't allowed & asking when a game will go on sale is not allowed. Use SteamDB to look at sale histories on games. Source: 7 months ago

You can use the Steam console to download older versions as described here. You can get the depot and manifest IDs from SteamDB. Source: 7 months ago

You can set up a server so that access to the world is constant without relying on a host player to open the world to LAN. Tutorials can be found on the wiki. You can also find server hosting sites, such as Nitrado, which can vary in price though some are free to use. Source: about 3 years ago

Here is the site where you’ll rent the server: https://server.nitrado.net/usa/rent-gameserver. Source: about 3 years ago

The easiest way is to purchase a Realm or a server via a hosting company. I've personally used Nitrado and it's decent and fairly cheap. There are also free hosting sites available, such as Aternos. Source: over 3 years ago