For example, long term interest is in the 3% range and  interest rates are currently under 4%.  

Granted one has a great credit history and a sum sufficient for a down payment. 

If each of us signs title on a property is that sufficient protection or would an LLC be more beneficial?

What kind of properties are you buying in Antelope Valley and at what price range?

Hello Douglas,Couple of quick things about Seattle that are probably good for you to know going into this.If you are looking to buy a house, especially in one of the higher-end neighborhoods, then prices will probably quickly climb into the $500K-$1M range and beyond.

Particular price range?

At best if you financially qualify for a conventional loan from a traditional lender,you can get an FHA loan with 3.5 percent down if you live in it with the tenants.You will need a good job and good credit with sufficient income to qualify for that loan.Otherwise,you're looking at hard money loans with 20%or 30% down and several points upfront and a higher interest rate around 7% for a minimum of two years before you can refinance to prove you can manage the loans and make payments without problems.That's how professional investors do it normally.

Whats the price range that similar properties are going for in the area?

When I got into the business, I was driving a 6 year old Range Rover (when I bought it) that I paid $21k for.  

You would do well to request a copy of probate "Letters" to review for powers.If full powers, a (15) calendar day notice of sale is sufficient, unless an objection by claimants, creditors or heirs.If limited or special powers, court confirmation is required and may be subject to overbid.