My first house was $50k with ~$550/month house expenses (HOA / taxes) in New Jersey. My current house is a $150k duplex with ~$200/month expenses (excluding utilities) in Michigan (and about $600 in income rent from renting the other half of the house).
Choose frugality level up to your comfort, but also read up on Positive Psychology and Hedonic Treadmill to learn how to squeeze more happiness out of your money.
Best article: If Money Doesn't Make You Happy Then You Probably Aren't Spending It Right
https://scholar.harvard.edu/files/danielgilbert/files/if-mon...
In general, you just need to plug in your target income from your investment, and your expected long-term return in percent. That gives you the amount of money you need to save.
The more you save per year, and the lower your target income, the faster you get there.