I don't want to demand more than I should, but I don't see how I can make accurate decisions with so little information.

You must know accurate rehab cost, closing cost, carrying cost, rehab timelines, and ACCURATE ARVs.

all very good advice. add to that a trip to www.annualcreditreport.com. by federal law, you are entitled to one free credit report from all 3 agencies each year. this is where you can get it. and, yes, it is free as opposed to the free credit reports websites which are anything but free. in this website, you can dispute any negative information that you do not agree with. many peoples credit report will contain things that are not theirs. these agencies are NOT accurate by many means. they mix up stuff with people with similar names, close social security numbers, etc. go to the website and check things out, you can improve your score easier than you think. and, by all means, please accept and use the advice of the people who have answered you back prior to myself. it is good advice

@John Zoulis I wouldn't trust 100/sf, you might ask a local builder to determine real and accurate prices, 150 and 200/sf is a safe number, for analysis, use those numbers, many can do it at 150, but your GC choices will be limited, use 200/sf just in case you run into problems or not have enough experience.

Although this is accurate for the vast majority of Hard Money Lenders, and the best advice in this article is to "not try to fit your deal to the numbers", there are a very few Hard Money Lenders that loan on both the acquisition cost AND the rehab cost and they treat each as a stand alone transaction subject to their own LTV limits. 

I just hope people are estimating accurately. 

If you read carefully you'll find there's always a statement in those listings that says "Information believed to be accurate but not guaranteed.

That is 100% accurate, but knowing you can get out makes you much more likely to go for it and get off the sidelines as a new investor.

There was legal table gambling, the drinking age was 18, steaks the size of car tires and she made a bundle.

One problem with commodities is that they are a bit of a gamble because the price is based purely on demand and supply and demand often changes suddenly as investor sentiment changes.The stock of a good company with good financials and good growth prospects is much easier to value because it is based on the cash flows that the company will generate.