If you secure additional financing it gets more complicated and you will have to pay taxes on the additional finance part. 

I would personally use residential financing in your situation because the 30 year amortization at a fixed interest rate will mean higher cash flow and security against rate hikes.

I would suggest that you should never go below a 50/50 or 50/25/25, with you securing 50% of the profit. 

My fiance and I own a rent control property in LA and this is my first time hearing about increasing security deposit to correlate with rents... so I'm strongly recommending that you contact an RE lawyer because RSO has a sh*t ton of rules.

Then she signed the lease via DotLoop and sent security deposit and first month rent via CashApp - just to secure the house.

They've given me a bank check for the security deposit. 

I've talked to our mortgage broker about securing a loan for a second property, and according to her, with our DTI ratio, we only qualify for about a $70,000 mortgage. 

And unless you hold a big security deposit, in which case you can play nasty and don't give any back, good luck trying to get her to pay the bill that you sent. 

Is there a web host or certain online service provider you would recommend for getting motivated sellers to enter their info so I can follow up with them as well as put them on email campaign?

It comes natural to spend time here on a regular basis or in phases, since, as a syndicator, I would otherwise have to spend more money on advertising and marketing in channels less targets and effective.Where else would I find such a focussed group of people wanting to invest their private capital into my projects to improve their yields and gain equity in a business secured by tangible assets?