In this link you can do search criteria and play around ...
Criteria 1- Price of business - <100000
Criteria 2 - Cash Flow >150000
This will 'theoretically' show you businesses that are for sale for less than 100K but are making more than 150K a year... You can also do,
Criteria 1- Price of business - <50000
Criteria 2 - Cash Flow >150000
Or
Criteria 1- Price of business - <200000
Criteria 2 - Cash Flow >3000000
Your aim is to maximize cash flow and minimize the cost of doing business. Also good businesses cost less money to operate (less maintenance cost). Good business have competitive advantage (some kind of value of being the only business in certain location etc)....You can study these businesses for sale...and see what makes a great business and try to find such business for yourself..
https://www.bizbuysell.com/businesses-for-sale/?q=/wEFQWNmZnJvbT0xMDAwMDAmY2Z0bz0zMDAwMDAmaXI9MSZwZnJvbT0yMDAwMCZwdG89MTAwMDAwJnM9VVMmc3BpZD00