I recommend you talk to a lender and get real clear on what you can qualify for, what you can do to improve your borrowing position, and make sure you have your finances under control.

Many houses with obvious distress are not going to qualify for conventional financing.

There is no limit to how many you can buy at 10% down as long as there are separate markets and you can qualify.

There aren't many multifamilies here in Denver, and most of them need work and have trouble qualifying for a VA Loan.   

A quick google search for "va loan bonus entitlement" should provide you with all the information you need.Yes, anyone can assume a VA loan so long as they financially qualify.

That would be fees such as real estate commission, title costs, qualified intermediary fees, etc...

I know every lender is different but I was curious to know what are the requirements in order to qualify.

If you assume the loan then it is a qualified assumable so have to jump through many hoops and it will end up on your credit which may effect your future transactions.  

Seller finance deals work when one of the following situations is present1- property can’t be financed with institutional financing usually because property is vacant (commercial property) or in bad condition2- seller will only accept an above market price for the property and by offering seller financing opens the universe of potential buyers to include people who wouldn’t qualify for financing3- seller is able to obtain a “piece of the action” from a buyer rehabbing the property and hence ultimately obtain a higher price.4- the seller has an existing low interest rate mortgage and wants to “wrap” the existing mortgage into a seller financed higher rate mortgage and pocket the differential 5- property is an investment property, seller has a low basis in the property because of depreciation, and wants to spread out the taxes due.Are you thinking of trying to purchase with 100% seller financing, or are you able to /willing to offer a down payment of say 10-20% .  

If someone says 5 or 7%, they may or may not have decades of experience behind them to qualify such lower numbers.