It depends on where you live, what your lifestyle is like, what sacrifices you can make and what you already own. I won’t give you prices, but I will give you things to research and look into:
1. Rent. What are must haves (1 bedroom? 2? backyard? apartment? house? basement? mainfloor? ocean view? downtown core? all of these will effect pricing. You can check your local classifieds for average prices)
2. Utilities and “necessities”. Ask friends and family to find out how much the average family in about the size of house you are looking at spends each month on water, electricity, gas, cable, internet, home phone and cell phone.
3. Food prices. I’d ask your family how much they spend on food each month and then assume that how much it costs to feed a family of three is what it will cost to feed two of you. Most people when they start living together and cooking for each other are still learning tastes, likes, wants, etc and some food will go to waste for the first bit.
4. Furnishing. Gah! Most expensive part. Make a list of what you NEED and what you WANT in a house. For example, I NEED a bed, but with my finances, it took me almost 4 years to have a headboard and footboard for that bed and that same amount of time to get night tables. I have friends who consider a tv a need, but it is something I could live without. Something most people overlook when finding how much it will cost to start a household is bathroom items (soaps, shampoos, toothpaste, toilet paper, cleaners, shelving, toilet paper holders, etc), and kitchen food staples (butter, ketchup, spices, etc). Three times I have had to “rebuy” these items and each time I have easily spent close to $300 on those items alone.
I would say to move out you need to start collecting furniture from friends, family, etc, set aside money as a “moving fund” and research like crazy to find out what you need.
As for me, I live just outside Toronto, Ontario, Canada. I have an amazing deal on my rent and we spend about $1300/month. Our home and 2 car insurances are $300. Gas is about $400. Groceries are $200 (if I coupon a TON) to $400 (if we eat out a bit). Utilities in the summer are $150, but in the winter go up to $300. Our cellphones, cable, home phone and internet set us back about $300. On top of that we have car repairs, going out, clothing, savings, two dogs and their vet/food/toy bills and then our “just for fun” money. All said and done, we spend about $3000 a month before the “fun” things like clothings, gifts, savings and going out.
When I was a student and lived in a basement apartment for $700 including utilities with nothing but internet and a cell phone and a bus pass instead of a car, I managed to live on $1400 or so before clothing, gifts, savings and going out.
Allllll what you are willing to give up!