As a Person who previously Experienced 16+ year Family owned Restaurant

Look for this:

1. How are the Menu Priced.
2. How is the ratio of supply cost of vegetable & meat.
3. How much they make per day.
4. How many people working.
5. How much you pay for workers
6. Do they Deliver. [Higher Expenses, need hire = expensive]
7. What Type of Restaurant: is it a Family Restaurant, Buffet, Deliver.
8. Do they give free stuff for a certain amount of price. [harder work if does)
9. Is everything working: like refrigerator, AC, & etc.
10. If they let: look at food delivery paper cost per week for supplies, and look at electric bills, gas bills. = You can estimate how much they make. [This part really is a Experienced person who owned a restaurant or own similar can estimate.]
11. Last of All: after all expenses, how much profit is made.