I'm open to ideas and subjects/information to research in case there is something I am missing or just don't know to look for yet.Thanks all!

These included cash buys for flips, seller financing, and subject-to deals.

We just got a deal under contract subject to the existing financing.

Your "clients" will disproportionately be elderly people who you will be taught to "help" - somehow you convincing them not to take market value by listing their home, or selling it subject-to, is "help".- In between finding these "clients" you "help solve a problem for" (in the language of the gurus), you will be angrily dismissed by hundreds or thousands of people, if you are able to get into contact with them. - In the extremely unlikely event that you get a property under contract, your assignment fee, in many locations, and probably on average, will be less than the commission a licensed broker would have received for selling the property. - You will be at risk of breaking the law, as many states are creating laws that effectively ban wholesaling, and while wholesaling gurus claim that this is not the case, they are either lying or deluded.

As for offering subject-to financing, this is something that can be advertised under 'seller financing' in our local MLS, and there's investors that search specifically for listings with that marked, so that should introduce your property to a new set of buyers that may not have considered it before.

Upon inspection the appraiser will see the crawl space and see it was a mobile home plus a HUD tag and public record.One of the requirements in mobile home financing is the property "Must" be on a concrete permanent foundation(in order to be real property) on top of that it requires concrete pillars, skirting and the "Well and Septic" dug and placed within legal distance from subject property.

I'd suggest you ask as many questions as you can, there are a ton of people on here who are knowledgeable in many subjects. 

You still claim the income as miscellaneous income and deduct property taxes and mortgage interest (subject to SALT and other high mortgage limitations) on your Schedule A, but that's it.2. 

Leverage is key and the diversity of options is also good.

Hunt down a book - "Investing in Real Estate with Lease Options and Subject To Deals" by Wendy Patton.