Selling to yourself from your LLC to your IRA would be considered "self dealing" in that it isn't an arms length transaction since you are a principle/owner on both sides of the transaction. 2.

But I did the math and for me personally that was true, I'd pay off my mortgage 5 years early if I paid an additional $100 each month to principle. 

This is why I emphasize education of real estate principles, law and finance are essential for the real estate investor.  

Business credit is largely irrelevant until you get into the true CRE and commercial lending space, and even then, the key principles are weighted heavily.

There is no way of knowingMy advice to everyone is this.Stop thinking with a scarcity desperation mindset.If you think it is ok to harass 1000 people to death to get one contract signed, you really need to reevaluate your business ethics and principles.

Assets identified in this study include:Permanent Fixtures: windows, doors, bathroom fixturesStructural Components: Roof construction, drywall, wood framingBuilding systems: water heater, electrical distribution, HVAC, plumbingInterior Construction: Wood flooring, stairs, ceramic tileThis engineering-based cost segregation study included the following methodology:Physical Inspection through a site visitDocumentation review including architectural plans, accounting records and construction documentsA cost analysis which utilizes engineering principles in order to allocate costs to their applicable asset classificationsCalculation of the depreciation schedule using MACRSAs a reminder, bonus depreciation started to phase out in 2023.

Since PITI = Principle, Interest, Taxes, and Insurance you could look for anything that lessens any of those variables. 

If you want to figure out the value logically, you can create a spreadsheet that will show your cost of financing and principle paydown on an annual basis to figure out the break-even date between the seller-financing price vs paying market price, but with bank financing.You mentioned a 40-year term, but is there a balloon?

It's the same principle you would practice with a mutual fund: it continues to grow (hopefully) and you pay a tithe from the prophets received at the time the profits are received.I am not strict about this by any means, for myself or others.. what other people give is not my business and I do not believe in people giving under compulsion.

Since basic real estate investing principles are the same, where the group is doesn't matter. 5) LLC's are the least of your concerns at this point, insurance is more important.