I can't say I start that year generally knowing how much I'll spend on games. I don't have a clear cut "budget". I can't buy everything I want and started saving to send my wife to get her Masters and save for some trips we have planned this year. Most of that is coming from my "fun" money doing overtime and jobs on the side.
That being said, I will have to think a little more carefully this year about what games I'll be investing in. So far my game list for 2020 looks like...
1. Rococo Deluxe (If it's under $100 or very close)
2. Hopefully Tuscany expansion for Viticulture... $25ish
3. Gloomhaven: Jaws of the Lion...(depends on cost around June or July)
4. Frosthaven (Again depends on cost but I'd guess around $100)
I might even have to bail on a couple of these which means I'd hold off on Frosthaven because I have a friend who will probably buy it and maybe Jaws of the Lion to allow for the price to drop a little and see if any corrections come out.
The main struggle is knowing a lot of new games will come out throughout the year that I will what. I've already added Maracaibo to my list of potential games and Marvel Champions seems to be a game worth looking into. And if there's another Wingspan expansion...