After reading your question I would like to provide you with some advise:
1. Make sure you have access to MLS or another website that you can check houses recently sold etc.
2. Any house you buy make sure you're buying it at 65%. Meaning that after you've bought the house, fixed it up and accounted for all your variable cost you are in it 65% of the actual retail value.
3. Time is money. I wouldn't fix the house yourself unless you are a contractor and you have plenty of time on your hands. I would hire it out while you look for the next deal.
4. Finding the deal. Make sure you find a market preferrably with houses in the 85K-150K retail range. These are the houses that sell fast. There are tons of people looking to buy these houses. When you get over 200K your market goes down b/c most people can't afford over 200K. I would find a working class nice neighborhood. Drive around and see if there are any vacant houses. Also you could search for mailing lists in your specific market. Put Bandit signs in these areas. Make sure you have a specific questionaire for people when they call. You'll want to be able to weed out the people that can't do the deal or the deals just not profitable. Once You find the deal at the price point you're comfortable with go for it.
As for Hud homes/foreclosures you can sometimes get a deal but you're bidding with all the other newby investors who don't market themselves and they drive the price up. Sometimes so much that if anything goes wrong you're not profitable. The key is to find the market where you want to be. Market that area like crazy. exp: Bandit signs, mailers, door to door , flyers, Anything that will get your phone ringing with potential deals in your target area. It might take you several months and several phone calls with misses before you land a great deal. But at the end of the day that one deal if you get it at 65% total will pay for the year. I stress the 65% b/c at that price you pretty much have evaporated all your risk. If you did your research on prices in the area and take all rehab factors into account before you make your offer you will find it difficult to lose any money this way.
**FOLLOW UP IS KEY** If you speak with sellers and they aren't willing to pay you what your offering. Ask them if you can follow up with them in 3 months. Even if they say no follow up anyway. You'd be suprised how many people will come around to accepting your offer after they're property has sat on the market for 3 months.
TO MAKE IT EASY
You can automate your phone service. You can hire a service to take these calls for you with a specific script of questions you provide. they will type these answers and email you a list of all your calls everyday. This makes it easy for you to quickly sort through the potential and not so potential deals. This costs $1 per min and the typical phone call last 3 mins. So thats $3 per lead. That may sound like alot but in the end the prize outweights the amount you pay in the beginning.