First off those homes don't exist, and the ones that you can get for 30k are not the type of home you want to rent or flip. Never forget location is still king Walley. Also, don't ever think a property is a good deal just because it is cheap.
Some of the cheapest flips that you can get will be around 70k purchase price with 35k in repairs average in the single family detached housing arena. You can get TH's a little lower, and then the repair amount is drastically lower as well.
But VA is not going to cover these types of houses, and where are you going to get repair money? If you are saying that you want 100% financing for the purchase and repairs I have some hard money and private money contacts that will finance you if the home is bought at the right price, but any other way good luck.
If I were just starting out and thinking about investing I would start initially with something safe; like a TH where the association allows rentals. I had a friend just a few months back by a TH for 76k that he did not have to put a dime into fixing, and he turned around and rented it out for $535/month positive cash flow. Granted, he put 25% down because he was non-occupant so the numbers are a little scewed, but nonetheless with rental prices still high (and financing still tight) this is the easiest strategy for beginners in my personal opinion.
Oh and by the way I should mention that housing is going nuts right now in the twin cities. We are officially in a sellers market defined by months supply of inventory, although with winter coming up here there won't be much to talk about above the first time buyer price point of about 160k. Spring of 2013 is shaping up to make huge price gains.
Good luck to you and thank you for your service always!