Even my wife has to technically disclose that her husband is an agent while doing deals.

That money is not technically an "expense" as far as the IRS is concerned. 

I think that might be what I have to do to ensure it doesn't get thrown out over a partial payment technicality, what do you all think? 

A "rich" investor is not likely to have wasted the $100k they borrowed against their 100 yo investment property, and they likely won't be concerned at all about the vagaries of the economic cycle which could technically place them "underwater" for that property, because, they will have a large portfolio of diversified properties, and will only be leveraged at around 75% of their current book value, which means that the economy would need to to take a really steep dive for their $135k property to become only worth $50k.

You can technically begin the process as soon as the payment is late (after any grace period).

So if you have the cash and can buy a great deal w/ tenants you would technically be making an income.

It is technically true that you won't see a mathematical "gain" for several months or even years depending on the situation, but a lower rate will immediately increase your cash flow each month which could be a good benefit.

And technically it would be allowable to sell one property deeded in an LLC and have your replacement property deeded in the name of a different LLC.  

And technically it would be allowable to sell one property deeded in an LLC and have your replacement property deeded in the name of a different LLC.I would always still recommend that you make your deeds match as closely as possibly however because confusion in a field audit is not unheard of.

So if the boiler turns on but s 50 years old, it technically cannot be considered something the seller has to fix