I intend to use equity on existing property(which will be a rental) as a down payment on the next property(ies).

What would down payment/financing look like for something like this?

You'd need 3.5% down (you can borrow it from your TSP or 401K or gifted) and 3 or 4 months PITI in reserve (again TSP or 401K) & your payment will be higher due to mortgage insurance, but you don't need any property management experience at all.  

Depends on the lender, check your Loan Agreement, depending on the term and purpose of the loan, it will specify either monthly payments or a balloon at refi.Read anything on BP, they have the resources you are seeking

You can still file for eviction based on the non-payment of rent - still 3 weeks left to go.

I joined a real group and was contacted by real estate agent who wants to work with me to buy my first home I'm about to get a pre-approval letter what should I do if I don't have the down payment is there options for me

Trying to make my down payment money go further kind of thing. 

Down Payment of $415,000 looks like the difference of the Selling Price to existing Loan balance.

@Ali KnoxThere are several ways to look at thisCash Flow  It is not clear what your down payment is.  

Two local banks I use offer HELOCs on investment properties so I have those ready to go if I come across a great opportunity and can use the HLEC as a down payment.