@Jessie Cervantes DSCR loans require 25% down payment and are higher interest rate than a conventional 30 year note.

Jack Bosch and a lot of the land flipper guys who teach it like to have their students buying in the high deserts and remote areas of the Western US  or in FLA like le High Acres etc. this is were cheap land is and land that gets traded constantly at tax sales.. the play for most of them is really simple.buy at tax sale or with direct mail.. for a few grand  re-market them for more and sell on terms and collect monthly payments.. 

I've recently seen people giving advise to take out a HELOC as a means to pay your normal everyday expenditures including bills, and at the same time, taking your paycheck from job and applying it every month towards your mortgage payment.

I've been saving for the past year as much as I can and I've got about $20K to help with a down payment on the next property.

Does the down payment and income requirements make it difficult for first time or low income buyers?   

Do note that only the mortgage interest that you pay is deductible, not the principal payments, but you'd also be able to take depreciation and possibly other expenses on the property such as utilities or maintenance.

Would reconsider in the future: -20% down payment.

AS @Kevin Sobilo pointed out this is very STATE specific.some states is quite clear cut others it utterly complex.

You take the monthly rental income and divide it by the monthly payment (principal + interest + taxes + insurance) and if that number is greater than 1 you have met the basic requirement for DSCR.

I did a 1031 Exchange for the investment so had a large down payment.