@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.

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.

I am a first time real estate investor looking the following property : https://www.redfin.com/OR/Forest-Grove/2418-Cedar-Cir-97116/...its a pretty large duplex in Forest Grove OR,  the trick is though, its on a lot zoned for a 4 plex so I am lookinginto house hacking, converting into a triplex, then living in one unit while renting out the remaining two unitsThe left garage has been converted to living space, with a living room, half bath, a laundry room with a sink and some counters/cupboards and a bedroom, it is a part of what was an existing 3bd unitIf I were to acquire the asset, I would first attempt to convert that space into its own unit The line items as I see (be in mind, I am totally new to this) would be to >put up dry wall where the door to the rest of the house is,>add a shower to the half bathroom >install a water heater in the adjacent 3bd unit> install a kitchen in the laundry room, (stove , oven , sink, counter space)>add a shower to the half bath Assuming I can convert it to a 3plex, I could at-least cash flow on my investment after I leave My plan would be to put minimum down payment of 3.5% (FHA loan) that way I can have a decent amount of capital free to do the renovationsThe only concern is when I crunch the numbers to get my ROI, I have no idea how much its going to cost to convert the additional living space to a third unitAny experienced investors here know how I can estimate this before I try to make an offer?

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

Someone to potentially front the down payment or work on some sort of equity deal. 

If you ever decide to purchase a non-owner occupied single family property, some lenders allow you to put down as little as 15% for the down payment.