For most of our account holders at New Direction IRA, the criteria that they look for regarding a provider and their IRA lending strategy are these:- Can my IRA's borrower make payments online?

We have a few portfolios of properties for sale, multiple states.Most of the properties are a part of some portfolio.We are trying to sell the entire portfolio, or individual ones.Hopefully someone has gone through the marketing process for a rental portfolio and can shed some light.For now, my plan is to do online marketing (adwords, facebook, bigger pockets).

Even outside of what we teach them, just us going in there and smiling at the inmates and loving them and listening to them, it's game-changing.

Ask them if they will lend on line 120 of HUD-1 (..pretty sure it's 120) This process is a bit out of the box, which lenders are not usually a fan of.

PR is nothing but run around and greasing palms, playing stupid games, and contacting 37 different people to get simple answers. 

As @Lee Ripma mentioned "Set For Life" would be a great book to read.As far as choosing the right market... you can read several reports online (just search google for XYZ city real estate report).

I’m looking to open an online account with vanguard, TD Ameritrade, E*Trade, or maybe even the Robinhood ap with my checkbook sdira to buy REITS.

They have more skin in the game then you do.Make sure you get clear title.

Can anyone recommend an easy to use online payment app or method for allowing tenants to pay online and direct to my account?

Lease docs, contract docs for when our clients buy/sell houses, anything we need signed is done through there.Giving tenants the ability to pay online or with a card.