You cant project time to win without knowing how many plots a farmer has. You've gotta have 100+ TB plotted (prolly closer to 140actually) at this point to have a chance at winning every 3-4 months.
A single plot would put you closer to 7 years.
Farming status: Farming
Total chia farmed: 0.0
User transaction fees: 0.0
Block rewards: 0.0
Last height farmed: 0
Plot count: 2
Total size of plots: 202.674 GiB
Estimated network space: 7357.090 PiB
Expected time to win: 20 years and 1 month3-4 months is currently around 18 TB.
EDIT: 100 TB would get a coin every ~ 18 days on average.
That number does't account for how many more Chia farmers will exist in 1,2,3 months. It doesn't even account for linear extrapolation of total plots in the world, let alone exponential.