I've even paid for a subscription to have limitless access to all articles on multiple of these websites.

The reality is that you will not find that in the seller finance space, and even if you do, there will be virtually no discount. 

Make sure your real estate agent isn't just about closing that one deal but understands the benefit of protecting you on each purchase to ensure that you keep buying because you are enjoying success.  2.

If you pay more, you won't meet your metrics and will probably have negative cashflow and/or equity.You may have to make 10, 20 or even 100 offers to get one accepted at the price that meets your numbers.This is what all investors did BEFORE the Great Real Estate Crash of 2008-2010.

Plus the added requirements around getting drawings and general contractor for even adding a tiny closet.

If he does pay, then you can just  cancel it but if he does not, you haven't wasted more time and have delayed the eviction process even longer. 

BiggerPockets also has a calculator to analyze deals, and I highly recommend you start this as soon as possible, even if you are not ready to buy.

and they charge per door and not sure if they even offer everything that I want. 

Meet with the PM and their staff, even if it’s virtual.

I'm seriously considering trying to find something there, but need to build up my knowledge and contacts of reputable agents and contractors etc.I'm interested in multi-family, STRs, commercial, self storage, and possibly even flips if the right opportunity came up.